The Standard List
Threadhopping: I'm typically game
Backtagging: Go for it.
Hugging this character: He's in favor, I'm in favor.
Kissing this character: Not on a first date; he's not that kind of guy. Nah, but seriously, Dresden is in a fucked up emotional place right now, so romantic involvement of any kind will be difficult for a while. And Dresden does not do the romantic thing frivolously.
More intimate stuff: What I said earlier? Goes double. Harry does not do flings, friends with benefits, or one-night-stands. He's a closet romantic, and even the closet isn't that deep. Also, I'm major uncomfortable with smut tagging. Sorry.
Punching: Hey, why not? Harry keeps himself in shape, but he's a mere mortal by and large, and so he's pretty much made of squish. If he deserves it, he probably won't even get pissed. If he does get pissed, though, he's gonna get... very pissed.
Injury: WOULDN'T BE THE FIRST TIME. I'd want OOC approval, and bear in mind he can regenerate from stuff other people never would. It'll take years, but he can do it. As always, please don't gm it.
Death: I'm going to want to discuss this in-depth before I consider it.
Anything not to mention in front of this character? I'd prefer he not be fourthwalled in-depth, but feel free to recognize him as a character from a book. Also, no spoilers from Ghost Story or the last half of Changes. I'll probably be canon-updating him when the next book comes out anyway, but in the meantime I'd rather keep him on his toes.
Harry Dresden is a wizard. Not only that, he's an extremely powerful wizard, albeit not a terribly skilled or subtle one. His magic has been cut in half, thanks to the wonders of Luceti, but half of Dresden's regular power is still pretty goddamn potent. He can't reshape reality or anything like that, but what he can do is use the latent energy in the atmosphere and area around him, as well as his own emotional and spiritual energy, to channel massive amounts of force. He's fond of fire, air, and force magic. He's also good at ritual magic, and though he can do some pretty impressive stuff with it, it does take forever to do.
Here are some specific abilities. I'm leaving it in the hands of individual players whether they affect their characters, and to what degree.
Magic Circles: Harry is capable of inscribing a circle and infusing it with magical energy. This does nothing against normal mundane people and normal mundane weapons. However, it will disrupt with the special abilities of humans with any kind of mystical or pseudomystical power, and it will stop anything non-human in its tracks. If done properly. Luceti, however, will render such things unstable- and, any physical disruption of the circle will completely eliminate the effect- toss something over the barrier, and the circle's down and he's ripe for the picking. If you come up against one of these, and you think you'd be stopped by it, your powers would be stopped by it, or you'd be totally unaffected by it, let me know.
Symbols of Faith: By channeling magical energy into his pentacle amulet- a symbol of his faith in magic- Harry can create a light that will ward off supernatural evil... In his world... Of course, it's a highly specific power to his world, and so it will not be reliable at all in Luceti. Some varieties of creature might be wholly incapable of approaching his amulet when he does this, others will likely be totally unaffected by it. Normal humans, of course, are automatically immune.
True Names: In Harry's world, there's a powerful magic to somebody's name. If you can master their name, with perfect inflection, with their own emotions and identity, you can use it against them. It's a vague sort of power- You can control them, to a point, though you cannot destroy their identity or who they are. You can simply immobilize them. You can even make them suffer. Or, more gently, you can use that name as a link to them, allowing you to focus on them with spells or simply to communicate brief thoughts and emotions with them. Harry, like most other wizards, collects True Names, though he doesn't use them as weapons- it's frowned upon, as stripping something of its free will violates the laws of magic. But they're still damn useful.
Plain and simple: Harry's adept at mastering somebody's real name after he hears them speak it. If he hasn't heard you say the name, out loud, in person, he won't have it. More significantly, if you don't want him to have it, he won't have it. He might make a mistake, get it wrong, forget a key element, or simply not have bothered to acquire it.
The Third Eye: Harry is capable of a form of mystical perception through which he can see the supernatural Truth of a thing, its aura and its magical energies, echos of its recent past and true nature, and any spells or supernatural abilities that have affected it lately. Such sight tends to be highly symbolic in nature. He doesn't use it at random, however; such sight is extraordinarily exacting, taking an incredible toll on his mind as the sights he sees are burned into his memory permanently. When he sees something through his sight, even brushing upon it in his thoughts will cause him to relive the memory as vividly as if it were happening again. He has learned many coping techniques for this, however, having Seen many times before. It is still not something he wants to do too often.
EDIT FOR CLARITY: The Third Eye also applies to the metaphysical truth of mundane people and items, allowing him to see aspects of their true nature and the emotional history of items. For instance, Karrin Murphy, a mundane police officer with the Chicago PD and a close friend of his, appears as an angel with fiery blue eyes, and her gun is seen as a sword of light and fire.
Soulgaze: Related to the Third Eye, you may notice that Harry doesn't ever make eye contact, and if he does never for too terribly long. This is to avoid the Soulgaze- when a wizard looks into the eyes of any mortal being, anything with a soul or a true self, he will see into the depths of their soul, and they'll see into his. He sees similar things to those he is shown through the Third Eye, but far more in-depth; their psyche, their inner nature, their past and their lives and their motivations, all in a simple symbolic representation. The amount of data conveyed this way is immense, but not specific- Harry does not truly understand somebody's entire being when he does this, but he'll see enough to understand the sort of person they are.
They will see the same thing in his, and while we're never given a glimpse into the soul of Harry Dresden in the series, we're told that most people who see it are visibly shaken by the experience. Some are ill. Some faint. Some are merely terrified. The few who've done so and spoken of it have given a few sparse descriptions- Michael Carpenter insisted upon it when they first met, and has since determined that Harry is one of the best men he knows. Johnny Marcone decided that Harry was dangerous, foolhardy, but trustworthy. Molly Carpenter described him as lonely, tired, and hungry. On the other hand, an rogue FBI agent with whom Harry soulgazed responded by screaming "I don't believe in hell!" and becoming violent. So, reactions may vary.
Obviously, if you don't have a soul, this won't work on you. (What constitutes a soul is vague; I'll leave it to your discretion.) It's also something Harry won't do without permission, though you can trick him into one or demand one from him. So, let me know. If you would like to describe their soul, or simply want me to extrapolate based on the character, s'really your call again.
Note: This only works once. Once Harry Dresden has soulgazed on somebody, he can never do so again. Molly Carpenter, for instance, can meet his eyes without causing any trouble at all.
EDIT FOR CLARITY: Yes, baseline vanilla human beings have souls.
And I believe that's it. Feel free to respond here, or tell me as we go along. When in doubt, I'll avoid doing anything that's iffy, so have at.