Quite a portion of the game actually doesn't interest me:
PvP (I've never liked PvP in games)
Crafting/gathering
Raiding after the first time for story completion (this can also really be extended to dungeons/trials as well - I just find it all so utterly monotonous, but I will do them to complete a quest or to help a friend out)
EX Primals for that matter (SM/HM versions are bad enough, why do I want to give myself more stress dealing with souped-up versions just for a remote chance to get an item?)
Chocobo Racing would have been fun if the lag didn't impact on it, meaning latency kills this for me
Sightseeing Log (I can never get these things done, mostly due to the required emote you have to do for it being so obscure in the description - it was an interesting idea to get players going out into the field, but just ended up broken in my opinion)