Most hated Maplestory monster?

I'd probably have to say the Geist rog. I've never even fought one; I just hate everything it stands for. It's the boss that pretty much sums up this game's feelings about mages at bosses. "I don't care how strong you are; you're gonna CLAW that thing, and you're gonna LIKE it."

Oh, and the black squids. Those used to piss me off back in the day. I went back there yesterday and got revenge, though. That's for clogging up my squid maps.

I have never APQ'd but i hate the event ones, and that was on my NL. Took me like 2 hits to kill, but actually hitting it was annoying as hell. Friggin teleport.