sorry for the late reply!! this has been in my inbox for like a week but i wanted to give it the attention it deserves!!
also i dont know if you’re asking for fandom headcanons that ive noticed or my own, but seeing as how i havent seen that many (none actually really spring to mind if im honest) this will just be an incomplete list of my own thomas headcanons unless otherwise stated
(disclaimer: of course it’s very difficult to have an original thought these days, and if you’ve seen these headcanons anywhere else, know i’m not trying to pass someone else’s idea off as my own, it just so happens that i have come to a certain conclusion that another person has, without me even seeing their posts. two people can have the same ideas without ever having any sort of interaction or seeing their posts alright alright glad we got that sorted)
fandom headcanons that r great and i fully endorse
- thomas is gay. he absolutely adores miranda and they share a sex life (whether that be through group sex, mutual masturbation, or straight up one on one sexual activity) but he is a homosexual man
- thomas is a top. this one the fandom seems to be agreed on. bottom thomas?? i dont know her
- he doesnt like wearing his wig much it is itchy
my own headcanons
- during elections he cast his votes for the Whigs rather than the Tories and should he have ever stood for office in the lower house would have done so as a Whig (the less right-wing of the two political parties during this period of British history) but believed party politics were dangerous and detrimental to the greater good of the country. He saw the dangers of the laizze-faire attitude the Whigs had and their sometimes aggressive anti-Catholicism disturbed him although sometimes the way he has been raised means he lets anti-Catholicism come into his line of thinking (as seen when things get heated with him and pops). That being said, he was, perhaps unsurprisingly, a royalist and had Tory tenancies (I think it’s safe to assume there was little love in Alfred Hamilton for liberalism, and I’m sure Thomas was raised a Tory) in that regard. Thomas was born very close to the time of the Glorious Revolution and with his family being an old aristocratic one, conservatism, in one form or another, would have been in his very bones.
- tl;dr ^^ he’s a liberal who dislikes party politics and subscribes to ideologies from both sides of parliament
- he’s a genuine believer in God and in Christ. He knows his scripture (he must be quoting the bible more than hes saying his own original thoughts in the show probably gfgdgfd) and Christ is important to him. He bases his life around Christ’s teachings – that’s why he’s so kind and so concerned with forgiveness and redemption and hope. He rejects the violence and hatred found in other parts of the Bible and has a great love for the gospels instead and finds his strength in Christ’s words about love and kindness and charity and forgiveness. He believes that to be a good Christian one must above all else be kind. He also highly values the lesson of the Good Samaritan (surprise surprise said no one ever) and reminds himself daily to never judge someone else for the life choices and decisions.
- his mother was just as bad as his father. I’ve seen people suggest that thomas’ mother must have been an angel to balance out the devil of alfred for thomas to have turned out so good and im calling bullshit. someone with two mean-spirited and cruel parents can absolutely be wonderful people, and in thomas’ case i believe it was the distance of his parents and their disdain and judgement of the world and unkindness that made thomas quite the opposite. he saw the mistakes they were making and learned from them.
- we know he went to eton. he deffo started kissing boys at the age of 13 or 14. he’s been a heartbreaker since teenagehood.
- he’s around 30-35 when we see him in 1705 (less a headcanon and more a lazy estimation similar to ones hundreds of other people have made)
- he enjoys sex a lot. he’s had a number of sexual partners most of whom were of the same social standing as he and he’s been in love before he meets james. he’s never loved anyone like james though. he believes james is his soulmate
- he is caught between thoroughly enjoying high society life with all of its frills – the fashion, the music, the art, the luxurious houses and exuberant interiors – and feeling guilty about being so rich whilst others have so little in comparison. he’s not perfect, and so he lets himself enjoy the glamour of aristocratic europe without trying to give it too much thought.
- it’s canon he’s a Big Thinker and was homies with other Big Thinkers (he probs fucked half of the enlightenment giants but thats for anotehr time) and I Think he’d spend a lot of time Thinking about Big Things you know like ??? would educating the masses be a good thing?? child labour, huh whats that all about is that worth it?? why are some people entitled to more simply because of who they were born as? and what even IS class? and other big questions politics and sociology and criminology and philosophy and economics and history students spend £9k a year thinking about lmao (tag urself im tragic politics student still cryin over the overlooked work engles did for yrs n yrs oh fred you was done so bad i lovE YOU)
- crazy horny boy have james wear a butt plug during dinners with alfred lmao oh tomhas you wild thing