Fappy said:
I'll list some from RPG's... why not?
- Dragon Age: The Fade portion of the Circle of Magi quest
- Knights of the Old Republic: Taris
- Knights of the Old Republic II: Peragus and Telo IV... AND Nar Shadaa

- Mass Effect: Lunar Mission (DAMN YOU ROCKET DRONES!)
- Mass Effect 2: Fighting Praetorians
- Morrowind: The first two hours of the game (roughly)
- Oblivion: Fighter's Guild Questline and getting approval to join the Mage's Guild
Edit: Some for Mass Effect I forgot...
- Mass Effect: Vehicle Sections not attached to the main quest
- Mass Effect 2: Probing pre-patch
I hope you don't mind me having a comment on your choices and picking perhaps my own pet peeves from the games mentioned.
Dragon Age: I agree with the Fade level - that took rather too much time. The Fade is cool, but by the time you've found another dead end that you need to transform into a different creature to get through (of course, it's only par for the course when you haven't acquired the needed transformation), you really do want to get back to kicking physical arse.
KotOR: Strange, I actually rather enjoyed Taris. What didn't you like about it? I have to say the part of KotOR I didn't enjoy was the part where enemies start spamming you during the final areas.
KotOR II: Yes, Peragus was convoluted and time-consuming. I was very glad to finally get off of that shithole, and to see it destroyed too. Fuck the galaxy and its needs - that place needed toasting.
Mass Effect: Chasing around searching monkeys was a part I did not enjoy. I also didn't like the Lunar mission as well, but mainly because I felt destroying nodules got a bit boring, even if they
did try to diversify things by amping up defences to them. 4 in one room, two rooms in a section, three sections in total - that got old fast.
Mass Effect II: I hate Praetorians, and husks in general. What I wouldn't give for a one shot-one kill weapon for them that wasn't as ammo-consuming as the Cain.
Morrowind: Seeing as I could never get into Morrowind due to it appearing to have a Fallout (1 + 2)-like combat system (that is to say: hit enemy at point blank range whilst the game calculates some shit - you missed again you unlucky twat!), I can quite easily understand this.
Oblivion: The persuasion game. That was terribly thought out. Who would've thought that threatening people, bribing them, boasting to them and making jokes constantly, in quick succession, would ever look realistic? I'm glad I could afford to bribe everyone at one point.
And my own personal choice comes from, in general, racing levels in games. I do not enjoy mandatory racing levels. The Jak games, though I love them to pieces and do not wish them to be changed, did mandatory race missions. Just not my thing, especially when the genre was specifically nothing to do with sports.