>>43306500I have't played OU in every gen to equal amounts and at equal skill level so take this with a grain of salt.
6>3>7>5>4>2>8>1
7 I have a soft spot for because its the only one I'm kinda good at. I can see why people say its braindead and that anyone can be good at it but I still think its cool.
I have some bias against oldgens because the sprites kind of bother me. 4 would probably be higher if I played it more, as its a really diverse metagame, but I never really cared to get into it. I have 1 at the bottom because I really hate the mechanics and rng bullcrap. 3 though I like because I find explosion so staisfying to use and a lot of mons I like like gengar/salamence/metagross are really really good. Also just a fun metagame overall.
8 is just really cringe and I hate playing it. Its obviously unfinished as a tier.