I don't think I could list my music collection on here... unless I sync the database on my Visor (wish I'd had the Stowaway when I input everything...). Suffice it to say that my tastes run a bit outside the mainstream, and I'd venture that many of the bands below you've never heard of...

Guided By Voices (currently wading through new 4-CD Suitcase box set)
Ryan Adams (of Whiskeytown)
Chris Whitley
Gram Parsons/Flying Burrito Brothers
Grant-Lee Phillips (formerly of Grant Lee Buffalo)
Joe Henry
Son Volt
Jeff Buckley
The Kinks
Uncle Tupelo
Blues Traveler
Gov't Mule (R.I.P. Woody)
The Who
Chris Mills
Tom Waits
Robbie Fulks
Beach Boys
Matthew Sweet
Johnny Cash
Ron Sexsmith
Neko Case
Shelby Lynne
The Jayhawks
Twilight Singers
Afghan Whigs

... and the list goes on and on. I've got somewhere in the neighborhood of 1,300 CDs, so I'm not going to list them all.