Mario, pokemon and the most of sports games.
Starting with Mario: I find it somewhat tedious and not very pleasant to play, and it doesn't help that it was one of the first things I tried on an emulator (nes mario bros), since it started from the first level every time I stopped playing, since I didn't know about savestates. I'm simply not interested in most of its games, although I tried to play Mario 64, but it still didn't catch my attention.
pokemon: more of the above but on steroids, plus it's super slow and boring. i still don't understand why people like pokemon so much. i tried playing pokemon red, and although i remember beating a few gyms, then some things happened and i lost all my progress, and even though i tried playing it several times after that, i just couldn't get to the same point as before. after pokemon red, the next thing i tried to play with more or less the same seriousness was pokemon emerald (gardevoir forever) and although i made some progress, it wasn't something that surprised me either (i couldn't even evolve kirlia and get gardevoir). despite the above, i have the sincere intention of going back to pokemon emerald and, at the very least, getting gardevoir... after having it, i'll see if i finish the game, if i only max gardevoir or if i'm satisfied and never touch pokemon again in my life.
And sports games: fifa, madden and others, is there anything else i should say? they are practically the same since the ps1 generation, or since the sega genesis in the case of fifa. i don't like either of those two sports in the first place. those kind of games are practically what many in the industry hate (the same thing over and over again, but in a different color). simply boring and, on the occasions i did play fifa, zero intuitivity, zero entertainment and zero control even (i remember that on one occasion the player i was controlling even moved by himself, without me doing anything).