Favourite (new-ish) bands:
Against Me!
Tegan and Sara
Arcade Fire
The New Pornographers
The National
Sufjan Stevens
Radiohead
Sigur Ros
Spoon
Architecture in Helsinki
Favourite old-school bands/artistes:
Joni Mitchell
Bob Dylan
Nick Drake
Fairport Convention
Bruce Springsteen
The Clash
My Bloody Valentine
Television
Beatles
Joy Division
I limited myself to 10 for both categories, or this could go on forever.
I am surprised that
Against Me! hasn't come up yet, though.