I think the only emotes I dislike would be '-_-' and '-.-'. Like you said Raskolnikov, I too find those two emotes rather rude and inappropriate. It's basically an insult in emoticon form saying, "Shut up, the world hates you now so go die." or something along those lines. Er, other than that, every other emote I either shrug off or find it either as a derp or friendly emote.
:)
Just... :) and :( <---They make emoticons on the forum, but this without the dots of course -:) -:(
If I had a floof for everytime a 6 year old online has used those emotes, I would be more than a geek.
And it's always the pedos on Omegle that use those emoticons for some reason. Acting all nice with :) and BAM, asks for your skype.
But yeah, not getting offtopic, those two just really P*ss me off.