Persona. The "music" is garbage, they take forever to get going plot-wise and frequently slow down and focus on banal and uninteresting things, and whilst I can appreciate the visuals from an abstract standpoint as something unique, they make me feel ill whenever I'm exposed to them. The characters are also extremely offensive a lot of the time personality-wise.
Kingdom Hearts is another series, if only because the always-awkward combat and excessive (and often badly designed) minigames put me off...and trying to decipher the overarching plot is an impossible headache at this point. I've tried repeatedly to get into this series and I just can't do it.
Any kind of eSports or multiplayer-focused game I'm going to avoid like the plague; I don't like PvP. Too much toxicity and general hostility. PvE is bad enough in some quarters in titles I DO enjoy...