Wilco, Uncle Tupelo, Flaming Lips, Jack Johnson, 311, In Flames, Sublime, Pearl Jam, Dave Matthews' early stuff. Most music sucks to me.
As far as newer popish stuff, I think the Linkin Park/Jay-Z mashup CD is pretty good.
I just don't see how anyone could like Fall Out Boy. To each his own and different strokes, I guess.
P.S.- first one to say James Blunt doesn't count.