In diablo II that end boss that is the big grub thing. Forgot what his name was but man I hated that thing. Would freeze you then mess you up. And once you went in his little cave you were stuck in that little circle getting your but kicked.
I allways hated that little punk.
Oh and slightly less the wannabe bunnyhoppers, the martydome with FF on.
Anyhow I hate getting killed right at the spawn.. its the worst And I hate idiots spamming the mic too.