No one has any favorite bands? I'll bite!
My favorites generally rotate as my tastes vary, but here are a few:
All time favs: The Moody Blues, Zao, Weezer
Current Favs: Baroness, Shrinebuilder, High on Fire, The Sword, Trouble, Electric Wizard
Favs that ebb and flow: My Chemical Romance, Fall Out Boy (specifically the Under the Cork Tree album), Underoath, Foo Fighters