Here is my list:
1. The invitations for games, quizzes, "here's a drink from..." etc.
2. Help "blank" find friends.
3. When people use it to sell their products.
4. YoVille, FarmVille and all the other things that people publish.
ETA: Other than that I love FB! : )
Re: What annoys you about FB?
Oh, I totally hate all the things that people publish from game apps. I have all of those hidden and it is so much better!
I also hate seeing like 20 status updates from the same person, in 1 day!
People who NON STOP say "I love my husband/fiance/son/daughter!!!", ok, I get it you LOVE your kids and husband/fiance. Good for you!
I also hate when people write things that are so attention seeking.
I agree about games, I block them. I am a Farmville player now and I had to go unblock Farmville so I could get bonuses from the game. Tee-hee!
I hide all of the game-related updates.
What annoys me the most is when people post "XX really needs a hug." And then 50 people ask what's wrong, how can they help, etc. I have one friend who does this all the time and it annoys me.
Mostly, though, I'm annoyed because I can never think of anything to update about! I always get so self-conscious about what I write! A lot of my stuff is DD related and I think that probably annoys other people, because they think I don't have anything to say outside of being a mom (mostly true). When you don't work, your world shrinks down pretty small.
Ahh, you have to! I even hide some people from my news feed. I have a few friends who write about politics a lot and it gets heated, I just hide it or that one status pops up in my face all day.
If you go to the top right of a game post, a little arrow thing will appear and it'll give you the choice to block that person or just posts about that game. I never see Farmville, etc., posts anymore.