I don't really have any I hate, but I think I see a lot of them differently than some people do and even what they're written as. This guy

looks to me like someone who's feigning innocence and I think it's cute, but then I see where people are offended by it, so I try not to use it. This one

says "rolls eyes (sarcastic)" but I see it as a kidding "Oh sheesh" like you'd do to a friend.
I think the smilies make communicating a lot easier than just the words on a screen, but there's still a
lot of room for misunderstanding.