Christina rocks. She's also a really cool front-woman. When I saw Lacuna Coil live she was really relaxed, joking with the crowd etc. Saying things like "This next songs pretty heavy? You sure you can handle it? Nah...I don't think you can..." until she got a big enough cheer. She has a cool accent as well tbh.
Tarja Turunen of Nightwish, but only with her hair down. She has a tendency to tie it back in insanely tight ponytails that make her look like the Mekon.

The devilish singer Nergal from Behemoth bucks the idea of Black Metal singers being ugly dwarfs. He could do with a smaller forehead though.

He's also qoutable. I'm especially fond of his view on teetotallers (Shoot the fuckers!) and self-important NSBM artist Rob Darken (Rob Darken? Who the fuck's Rob Darken? If Quorthon rises from the grave and starts handing out criticism I'll listen. But Rob Darken? Fuck him man!)
quite a few more as well, but don't have the time atm. I have an essay to finish
