Hehehehehehe really big list time!

Children of Bodom
Wintersun (<---best guitarist ephar imo http://www.youtube.com/watch?v=4jIz5jQikFQ...ted&search=)
Blind Guardian
Dimmu Borgir
Xasthur
Immortal
Iron Maiden
Ensiferum
Imperanon
Dark Tranquillity
Death
Opeth
Dissection
Amon Amarth
Metallica

and....well alot of other random things, like the occasional blues/jazz band.

Oh and Jools Hollands group.