A lot of them... I don't have a favorite one, but I mostly listen to these: Manowar, Steppenwolf, Sonata Arctica, Metallica, Iron Maiden, Suicidal Tendencies, Kreator, Sepultura, Rammstein, OTEP, Flyleaf, Nemesea, Revolverheld, Die Toten Hosen, Veruca Salt, Tito & Tarantula, Sopor Aeternus, Lynyrd Skynyrd, La Castañeda, OOMPH!, Halestorm, Dvar, Arch Enemy, Negative (Serbian band, not the faggish one), Body Count, Lambretta, The Cult, Shinedown, Kansas, Evanescence, Slipknot, Aerosmith, that's about it I guess... Few older ones from the '80s, some punkish bands from the '90s, and obviously there are bands from the '00s with few good songs hence they're not worth mentioning.