1) Justin Bieber fans thinking that all other music is worse or sucks (lol . . . . .)
2) "Did he died?" [On the flipside, "Da*n Nature, You Scary!" never gets old for me. XD Though I'm sure that will change soon. >_>]
3) Most blog videos there
4) Videos of YOUTUBE videos, recorded by an independent camera no less . . . .
5) The ad button that doesn't get all the way off the video you're watching. (I think Adblock fixes this in Firefox, but I tend to watch videos in Internet Explorer . . . . .]
6) Featured comments not working properly [I've seen comments with 64+ bumped off by a comment with 3+]
7) Religion vs. Non-religion being brought up on every other video.
8) People that baw whenever someone feeds an animal live prey.
9) People that can't type comments for ****, which is, sadly, the majority. Of course, since you can't edit comments, I can understand some of the mistakes, but some of the grammatical and spelling errors are horrendous.
10) The commercials that can't be refreshed "out of".
11) Double-standards. Seriously, there are some videos by popular people that are total b******* that receive great ratings while there are awesome videos by unpopular people that get poor ratings.
12) The inability to update videos, though I can understand that someone could replace a good video with a dirty one, how many people actually would do that?