I always hated this level, whenever I play this game now this is always one of the last ones I finish. I don't know, I guess it just feels really boring and unpleasant.
The Riverboat in Half-Life 2
True story, I played through the first part of Half-Life 2, loved it, made it to the riverboat, hated every minute of that, and stopped playing the game before I picked up about 8 months later. Very glad I did, but that section I have no desire to ever play again.
Flood Levels in Halo Games
The flood have always been a chore to fight and these missions consistently are the low points of each of the main trilogy titles.
I didn't get lost, the section was just tedious and boring. It was really bad. But overall, Subspace Emissary is the best adventure mode of any fighting game I've ever played. No other fighting game even comes close.
It was the same as the adventure mode, only more challenging?
No it wasn't the same as the rest of the mode. You weren't on a big fetch quest for the rest of the mode. The challenge wasn't the problem (and honestly I don't know what challenge was there), but the last minute fetch quest bullshit is what I'm talking about. It was annoying, stupid, tedious, repetitive, etc.
Pokemon Caves WERE NOT that hard. Wow...some of you people are just WUSSIES and you call yourself gamers?
I beat those things back in junior high with some simple trial and error in less than an hour. The only tedious parts were the random battles but otherwise the puzzles weren't that bad or hard to figure out. I can understand the Water Temple with that one floating block that uncovers a hole to get a necessary key, and the constant switching of the Iron Boots on and off...those parts are annoying to be sure.
As for other games that had annoying levels/segments...gonna have to think on those for a bit to recall some.
@CB200 Never said they were hard, but they're tedious as hell, you said so yourself.
Edit: part of the boredom is you keep running into the same old zubat/geodude pokemon in caves in Every game - I heard they fixed this in Black/White though.
Oh, that's only because of the random battles, but that is a constant throughout the game. I was more or less talking about the actual navigation and puzzles within the caves, things that you can't get around without actually solving them, but the random battles you can use Repels to get around.
I freakin' HATED the "Triple Triad" card mini-game in Final Fantasy 8. I actually wouldn't mind it if it were entirely optional. But at one point in the adventure, that confusing, convoluted mess of a card game is forced upon you in order to proceed. Ugh, so mind-numbingly boring. DID NOT LIKE.
Also in that same game, there is a point where you and the party must go and seek out Rinoa, the game's heroine, who is held "captive" on a white ship somewhere out in the ocean. Nothing like a boring needle-in-the-haystack, seek-and-find segment to further slow down an already epic RPG. The worst part is, that whole section could have been skipped entirely if Squall wasn't being such a whiney bitch.
The only thing that comes to mind right now are the underwater and space suit segments in KOTOR. They serve no purpose except making your character walk half as fast.
OMG the caves in the Pokemon games also annoy me. I especially hated the ones where you had to use Flash to even see. So many Zubats and near death experiences. I don't think I've really ever left a cave with more than 2 people (in the red) alive in any Pokemon game.
Water Temple also sucks, but I'd say some good chunks of the second half of Ocarina of Time are just as bad. Nothing like roller-coaster difficulty to set your adventure straight!
Flood levels in Halo's trilogy. Terrible. After the first one, you would have thought they could have fixed them, but they just continued on. Because they were important to the story, but holy hell those things just never got good ever.
"It's not so bad for me now, but as a 5th grader, fuck that shit. It took me like a whole week to beat." @comet I think that was the main reason some people hated it..... I mean..I tackled the water temple first year in College
The worst part is, that whole section could have been skipped entirely if Squall wasn't being such a whiney bitch. 
