My two fave villians are Scarecrow and the Joker. Scarecrow scard the absolute crap outta me when I first played the game. Mostly because I wasn't being to much attention at the time.
Scarecrow's saying: And at the end of fear...Oblivion!
Joker's Saying: Too Easy! Played like a violin then cut your strings!
I love Joker, Scarecrow and Riddler. I enjoy riddler's questions. Scarecrow scared me when you go into the Morgue and everything starts to go hay-wire. I enjoy anything Joker says but i cant recall excatlly what he says.