Not a top-ten list exactly, but a bunch of bands that I just love listening to (off the top of my head, there might be more). If I actually had a favorite band, it would be one of these:

Shinedown (I love most of their songs. Listen to dat shiet)
Rise Against (Similar to above, but not so much. I do, however, find both bands pretty similar, so the more good music, the merrier)
Take That (Gotta get my pop fix. Only the songs after they reunited in 2006)
Queen (Obviously)
Two Steps From Hell (Epic orchestra of epicness. God I hate that word; 'epic'. Goes to show how awesome this shit is)
Bon Jovi (which is pretty obvious, considering Smoke's theme)
Hinder (I love most of their songs too. Listen to dat shiet also)
Linkin Park (Their style may change from album to album, but it's all awesome. I may be somewhat addicted)

Others worth noting:

Puddle of Mudd
Seether
Trust Company
Three Days Grace
3 Doors Down
Fall Out Boy
Lostprophets (eh..)
Imagine Dragons
FUN.
Guns 'n Roses
Saliva
Limp Bizkit