The usual - Transformers, The Last Airbender, Dragonball: Arbitrary Subtitle, Star Wars prequels, Batman and Robin (No it's not fun to watch because of how bad it is, it's stupid and shouldn't exist), Green Lantern...
But those are all sort of a given. Here are two popular films I don't like. And I don't want to sound like a giant hipster fag by not liking very popular movies but what can I do?
Sam Raimi Spider-Man films - I just... They are awful. Awful. Even as a kid I disliked them. I found Tobey Maguire to be a) an unlikable, arrogant, gormless douche with zero charisma and b) an actor so incompetent at portraying emotion that he ranks up there with Kristen Stewart. I thought that MJ was a complete and utter buffoon who screamed constantly and was utterly helpless in every regard. Aunt May was bitter, manipulative and not remotely endearing. Norman Osborn was portrayed well by Willem Defoe but then he started talking to his mask while crawling around in a scene that was only slightly less cringey to watch than Mark Wahlberg talking to a plastic plant in The Happening. Alfred Molina was an incredible casting as Doc Ock and totally looked the part, but then he started talking to his arms. For fuck sake Raimi, why must Villains talk to inanimate objects? They tried painting Doc Ock as some benign character being controlled by... I dunno, I guess his evil metal arms? Whatever, he works way better as a precise, scheming mastermind. Finally, Spider-Man 3. Ugh. Everyone agrees that was bad. For me, it was like I'd spent years trying to convince a girl that her husband was cheating on her, and she called me a liar until finally she walked in on him having sex with his busty secretary. At last, the world could see the flaws in Raimi's damn films. Spider-Man 3 was so irredeemably terrible that I won't even explain my feelings on it.
James Cameron's Avatar - I guess it was a pretty cool sci-fi movie and everything, I liked some parts of it (Especially the Ikran - I think they were the most creative part of the movie) but generally found it to be sort of unimpressive. I mean, the graphics were great, but they weren't showing anything all that interesting. I prefer a really imaginative idea than a really expensive presentation of that idea. And let's be honest - Pandora isn't all that imaginative. Take a totally normal jungle, add an extra set of limbs to everything and then make it glow in the dark. Boom, that's Pandora. But whatever, I just found it forgettable. Anywho then I got home and over the next few days I heard this big rush about how Avatar was beautiful and touching and moving and had this wonderful cast of characters. What? I barely even noticed the characters. All I could even remember was that Sigourney Weaver was in it at some point and there was this badass chick with a helicopter and those two characters died even though they were the only remotely cool ones.
Eventually I saw it a second time, with friends, and honestly it went from "Disappointing" to "Irritating" as I had to endure it's waaaay too long run time and already predictable narrative a second damn time. And then over the weeks you just kept hearing more and more about how amazing this movie was. I didn't, couldn't, and still can't comprehend it.
Honestly, I think I hate hearing about Avatar more than I hate the movie itself. But damn, people, get over it. If you took away all the glow-y effects it would have been slated for being a completely run-in-the-mill, no frills cowboys and indians love story.
Other more popular films I dislike are Inception and The Dark Knight. Yeah, hipsterville. I wouldn't say I hate those films though, they just don't do anything for me.