In an effort to get back on the topic of the poll . . .
In my own humble opinion, and I am not trying to star a flamewar, I hate all of those groups.
I do, however, love listening to Iron Maiden and Judas Priest (that's the only metal I listen to really).
The former - I listened to them by accident when I was looking for something else and liked them.
The latter, I was forced to listen to on pain of a fate worse than death (imprisonment in Raptor's basement and endless humiliation on BF2142) by the one and only Raptor.
But I do like them.