[immel]

Rock or metal?

I listen(ed) a lot to Gack, here's a few, some are very mainstream, artists I enjoy a lot (bold ones I like more/listen to the majority of their songs):
Metal/Heavy:
Sonata Arctica - from Finland but sing in English
Metallica
Nightwish - from Finland but sing in English
Iron Maiden
Rammstein - from Germany and sing in German
Marilyn Manson
The Devin Townsend Band
Deep Purple

Rock:
Van Halen
Twisted Sister
Sisters of Mercy
Scissor Sisters
Queens of the Stoneage
Pixies
Nirvana
Guns N Roses
Electric Light Orchestra (dunno if this really can be called rock)



Metal/rock/something~
System of a Down (I like a few of their songs)

Punk:
Sum41
The Offspring
Blink 182

I don't know if many of those bands are very similar to the music you like, but if you like one of them I could probably narrow it down a bit and maybe tip you about more bands.