A lot of my Thec headcanons stem from my long term interest on psychology and serial killers. There is a somewhat famous man with an alias of The Acid Bath Murderer, he killed for money so he kept/sold his victims' valuable belongings. Thec was said to move into Robloxcity during its reconstruction, and he grew in poverty back at Vakroyd, so I do believe he got at least some money from killing. Some serial killers even like to take pictures of their cases and there is that joke art of him and Impish Photographer where Thec takes a picture of one his killings, but I don't fully believe he'd do that! His hatred and disgust for those he killed serves as evidence to back up this hc but also bring it down LOLOLOL
And yes Thec does use chemicals to dissolve his victims, but I don't see why he wouldn't bring a hand or two for his plants, bone meal IS a good fertiliser. Me and my friend discussed the topic of Thec and flowers before, we settled on the Narcissus/Daffodil and the Rafflesia!
Narcissus was a guy in Greek mythology who was cursed to fall in love with his own face, I took it as a "fun" way to represent Thec's extreme narcissism and him possibly being enamoured by his own work as the ripper. And also because I headcanon Vakroyd to be kinda inspired by Greece which makes Thec Greek in my heart
Rafflesia is the largest flower in the world, and boy do I have a lot to say. It is absolutely disgusting. It smells like rotting animal flesh, is parasitic, attracts corpse flies, looks like an eye and even a mouth at times. It's also a freakish red brown colour. Does that not just screeeaaammmm Thec vibes to you. Tell me he wouldn't keep that massive beast of a flower in the far end of his backyard 🥺
Honestly I've never thought much about hobbies for him, other than journaling since he's a professor. And I have liked the idea of him journaling his kills, since he kills for ego. And he golfs, he was born in 389 AD that man is OLD. He's a grumpy granpa doing old man things. He'd probably keep some material things though, at least to me. Body parts would maybe just be collected to test the efficency of possible new formuals, but it's not like Thec would hesitate to test it on a live person
The idea of collecting teeth is interesting honestly, he uses acid on his victims and it's implied not everything manages to be dissolved. BUT I MUST SAY... He's a collective of various serial murderers, and I also hc him to do the Dexter Morgan collect blood samples thing. He's a toxicologist so it just makes sense to me ok? ok.
But yeah uhh many things he could do. Thec's a misanthrope, a narcissistic maniac with no sense of consequence since he's always putting himself on top. Serial killers like him like to do morbid things to their victims (if dissolving them from the inside out by boiling their blood and wounds wasn't enough of a hint) so the possibilities are many... He is a writer to me though. Thec is smart, definitely reads and writes in the teacher's lounge to distract himself from the "pompous fools" around him... Basic scholar stuff :+P
CANNIBALISTIC THEC THOUGH.... BOY DO NOT GET ME STARTED ON DESPERATE URGES...... It SCREAMS Jeff the Killer and his suppressed aggressiveness. Cannibalism is actually peak "angst" (in many quotations) content for him because, again, he hates people... And would probably be disgusted to eat a corpse (if you don't count the chemicals LOL he's cooked) due to it being part of the very people Thec would rather die than to tolerate. It's not impossible however, acid takes some time to dissolve matter, and in big doses to dissolve a PIG, let alone a human!!! Slushberry acid is very potent though Thec will never need to digest a putrid fool again I think ixk hrlp