Threadhopping with this character - yes/no/it depends? Use your discretion. If the thread is labelled private/filtered--or looks private just from the topic of discussion or whatever, then I'm sorry, it's not open.
Backtagging with this character - yes/no/it depends? Yes. Very much yes. I'm not always fast in getting to tags and I certainly don't mind "late" tags to an entry.
Back-dating/future-dating entries with this character - yes/no/it depends? Yes! I certainly don't mind.
Hugging/kissing/other sort of intimate actions with this character? Hugs: go right ahead! And watch out, he just might beat you to the punch! Kisses: Ahhh, quick kiss? Sure, go ahead. Anything longer? I say yes, but his reaction might not be what the kisser hopes for. He's been down that awkward road a few times and it hasn't ended well. Glomping, groping, making his clothes disappear, etc: please ask.
Punching or causing some other form of physical harm to this character? If he deserves a good slap, don't be afraid to slap him. Most likely he deserved it. Wouldn't be the first time his big mouth got him in trouble. Anything really severe, please ask me first.
Is there anything that should not be mentioned near this character? Not really. He's pretty good with avoiding uncomfortable topics if they come up, so say/ask/ponder out loud all you want!
Is there anything you need us to know about interacting with this character (i.e. special abilities, special physical features, etc)? Hmm, this is covered in his app, but might as well reiterate it here.
His senses are a lot more sensitive than a human's (example, he can figure out the chemical make-up of something simply by licking it), he's moderately telepathic--more so than his earlier incarnations. He can feel the passage of time--all that is and was, what could be and shouldn't be and will be. He can tell when an event is fixed or in flux and he can feel that with other people as well. He can, well, used to be able to feel the presence of other Time Lords in the back of his mind.
Oh yes, forgot to mention this before. His body temperature is a lot cooler than a human's, about in the 60F/15C range, so feel free to feel a little chill when touching his skin or whatever.
Anything else that was not mentioned above? Yes. I, unfortunately, do not play out ships or anything of that nature. Where the Doctor is in this point of his life, he's not taking companions or anything, so it's very unlikely that he'd want to develop anything remotely like a romantic connection, so please be aware of that.
Also, I do use the audio series and Short Trips books put out by the Big Finish in my (back-story) canon for him, as well as other media for the show, like the New Series books from BBC Books, and other materials I've been able to get my hands on or read up on a bit on stuff floating around the internet. Though, chances are, I'm more likely to make up adventures that he had, though occasionally I will reference stuff from the show/books/audios like events and characters. So if he says he did such and such on planet X and you've never heard about that before, chances are that's just me making up a plausible adventure for him!
Back to him now. Some people just feel wrong to him. (A former companion and friend, Captain Jack Harkness is an example. Jack is a Fact in the universe and no one is meant to be one. All things are born and eventually die, but Jack can't. He can die, and die, and die millions of times over again and still come back. Jack's very nature repulsed the Doctor initially with his wrongness. Though, the two of them are friends and eventually worked through that oddity, but for the Doctor, it's a constant thing he's reminded of because time should flow right along with Jack but it doesn't.)
Also, basic thing about the Time Lords. Be warned, good amount of tl;dr here. They were sort of a pompous and pretentious race--being the ones with the highest technological advancements in time travel and just about everything else really doesn't help destroy that image--and were viewed as stagnant and corrupt in their thinking, something that continually frustrated the Doctor for centuries. They bound themselves to a strict non-interference policy, preferring to let the natural course of time continue to flow, and that even extended to when an outside force arrived to threaten that course. They would simply sit back and watch--and let others do their dirty work. (Think of them as a high profile dignitaries. The dignitaries can't go out and do things on their own--plausible deniability, etc, etc--so they hire a cleaner or fixer to handle the situation. In a lot of cases, that fixer was the Doctor.)
Now. This next bit is related to the Gallifrey audios, and I think it makes complete sense with the Doctor's later reaction to Jack and his past involvement with vampires. (Yes, vampires of the non-sparkley variety thankyouverymuch in DW, I kid you not. They didn't appear in the Gallifrey series of audios, though, just to be clear. They were in a couple of the early serials, and there was an audio involving them, but during the Dark Times before Rassilon and the Founders harnessed the various powers of time technology and created the Time Lords as they'd later become.)
Being a race of pompous individuals, it only stands to reason that the Time Lords would look down on races with lesser advancements in technology and culture. Which they did. For countless millennia, they only opened the Academy to most of the people who lived on Gallifrey, with the exception of those they deemed Outsiders. And with the ascension of Romana to the presidency, she changed that policy and allowed anyone who wanted to come to the Academy a free pass there. Of course, this sent most of the other Time Lords into a tizzy. Some embraced the change while others thought this would be the inciting incident of Gallifrey's downfall. (And while we know things ended with Gallifrey's complete destruction by the time we get to the New Series, we still don't know what truly kick started everything off for the last Time War.)
As far as the vampires go, that revulsion goes back to the early days of Time Lord society. They fought against the vampires for years and since both races are rather hard to kill (regeneration cycles for the Time Lords, near invulnerability for the vampires), the fighting went on for a long time. Until the Time Lords thought to use the one ability that can kill the vampires, namely the stake through the heart method. (Why they didn't think to use this sooner, I don't know. Silly Time Lords.) Most of the Great Vampires are dead now, but races like plasmavores still exist (one he met drank his blood through a straw jabbed in his neck and drained enough from him to make him seem dead.)
Really, that's a roundabout way of saying the Time Lords were a xenophobic lot, but at least they were across the board and even treated some of their own people like dirt. Take a look at the Doctor's own history and see how a renegade Time Lord like him was treated. The errand boy thing alone should be a good enough clue. But basically the majority of the Time Lords thought they were better than everyone else.
Though, I should make it clear that the Doctor wouldn't fancy himself as such by any means. Oh god, not at all. He's a lover of life in general, but even he can't completely ignore the Time Lord instincts of his when it comes to strange humanoid beings or things like Daleks and other strange creatures who may defy certain aspects of time. So if he seems a bit awkward to any and all vampires who will come to town/are in residency, or around those who don't feel quite right to him, that's why. It's not you, it's him. His encounter with Jack really opened his eyes to that.