It's kind of like, what games
don't I like is maybe a shorter list than what kind do I like?
And in any given genre, there will be loads of exceptions for me - like, I mostly don't like Eurogames, except the dozens and dozens I do like (which don't even seem to follow a pattern that I can find).
I don't like most card games, I guess, more because I've played them with annoying people than because of the games. I don't like chess much because I have like, serious ADHD and for whatever reason it doesn't trigger hyperfocus and also I played it with the most annoying people on the planet - over-educated upper-middle-class male teenagers (I still will not play it with anyone identifying as male, sorry!). I do really like Gin Rummy, oddly enough! I feel like Gin Rummy is almost somehow a proto-deckbuilder.
I really like deckbuilders in general, though theme and art will have a huge influence.
I love skirmish wargames, except the ones I don't. Been playing a lot of
Carnevale lately because a friend owns tons and tons of it (including like, enough models to play all the gangs, and tons of cool terrain).
I ban myself from playing the Game of Thrones boardgame, the only game in history, including RPGs, that ever managed to make me completely lose my mind IRL, standing up and yelling "I will break you!" (meaning "ensure you lose", not beat up, to be clear) at another player (who I love dearly) completely unironically and totally meaning it in the moment, even if I was like "What the hell man?!" to myself a few seconds later. Like, I've played with awful munchkins and horrible "It's what my character would do" people in all sort of RPGs and played against people were intentionally being twats in chess, against horrible abusive trolls in videogames and so on, never really got mad or yelled at anyone, nothing made me lose my mind like being totally and effectively betrayed in the GoT boardgame lol. Fascinating to learn that about oneself. Wine was involved doesn't explain that (I'm normally super-chill when drunk).
Talking of betrayal, I really like Betrayal at the House on the Hill and similar, I don't think I've ever not enjoyed playing that sort of game.
I guess one common trait is I don't like games that feel like cut-down versions of games I do like. So like, I don't like HeroQuest, but I do like Advanced HeroQuest or the modern Warhammer Quest. I played a ton of the latter lately with my nephews and one of my nieces, it was impressive how fast even the eight-year-old with ADHD as bad as mine (and no medication, and also he's eight) was able to pick up the rules and stick to them. Albeit the poor little guy nearly fell apart if anyone got to a treasure before him! I mean, that's being eight though.
I also don't like dungeon crawl stuff where it's more like you're having to solve a mechanical puzzle or worse, praying for RNG than, I dunno, dungeon crawling, particularly disliking games where whimsy or RP is basically a death sentence (possibly for the entire party), and I'd say both Descent and Frosthaven (and I assume Gloomhaven) fit into that. I really loathe Frosthaven because like, it has all the rules-learning of a complex RPG, without
any of the fun of a complex RPG, and with 10x the setup and breakdown time. A friend bought them thinking we could play them when we didn't have enough time to play an RPG, but it's like, the opposite - it takes insanely longer to play than an RPG!
Videogame-wise I really like almost anything that has style, and has good gameplay design. I tend can stand tons of repetition/grind in gameplay, but can't stand bland gameplay or art. Games that are too easy also rapidly bore me, as does becoming really OP so the game becomes trivial (if that happens, the game better finish in the next couple of hours).