Past:
Nirvana, Queen, Placebo, Pearl Jam, Muse, Skunk Anansie, Foo Fighters........ Note I have put bands which are still going in this list as I'd rather have seen them during their good years 10 years ago, rather than now!
Present:
Muse....... I love all of their music but the past stuff is my absolute fave! They sound soooo amazing live!