Halo. Seems way too generic for how much people boast about its setting. Technically I played the first one for an hour or so, the second one I watched a friend play and played a little bit of multiplayer with him, and the third I again just watched. I know watching and playing are different things, but after playing the first and second one a bit, I just couldn't see what the big deal was. Even the multiplayer felt...meh, and that's what pretty much everyone talked about.
99% of MMOs. I like RPGs, I can deal with a bit of grinding, but MMO grinding is a different beast entirely. Plus no MMO has ever had engaging combat, at least to me. I had small interest in Elder Scrolls Online, but playing the beta made it fall flat. Combat had no weight like it did in the main games.
MOBAs as well. I can understand wanting to be competitive in games, hell, I'm guilty of it. I sometimes take my online games very seriously and become very invested, but I never let that cloud up my true self. If someone doesn't perform that well, I typically won't call them out on it. Some people are new. That's okay. Some people have physical issues that get in the way. That's okay. Some people just aren't that great and just want to have fun. That's okay! If I'm so competitive, I should be the one that tries even harder to make up for that less skilled player.
In MOBAs, that doesn't fly. If I mess up one tiny thing, or do something vaguely stupid, almost everyone I've played with shouts at me and gets all pissy. No, fuck that. I didn't play a game to be yelled at. I don't care how bad I was. Teach me better then, don't ridicule me.
Sports games, unless it's racing. I don't like sports. They just aren't for me. Plus I don't want to mix myself with dude-bros and amped up morons who get infuriated at someone who doesn't like their preferred team. So naturally, I don't have an instant attraction to sports games. I've played some, and I've even had a lot of fun, but I do not go out of my way to buy them, and I never play them by myself.