No particular order:
R.E.M.
Talking Heads
Los Lobos
Wilco
The Jayhawks
No particular order:
R.E.M.
Talking Heads
Los Lobos
Wilco
The Jayhawks
In no particular order:
1: Nirvana
2: Pearl Jam
3: Led Zeppelin
4: Rage Against The Machine
5: The Beatles
Hmmm… tough one…
Faith No More
The Beatles
Radiohead
Alice in Chains
Mr. Bungle
That’s in no particular order
Aerosmith
No Doubt
Tom Petty
Then a rotation out of:
Evanescence
Blues Traveler
Led Zeppelin
Keep in mind my list could change at any time, and does.
But in no specific order, right now, this very moment:
In no order …
Depeche Mode
Anything Box
Mesh
VNV Nation
…and a tie for fifth between about a million bands.
1-Metallica
2-4, in no particular order:
AFI
Rammstein
Godsmack
and number five is either Black Sabbath, Slipknot, Flogging Molly, Evanescence or Tool (only Opiate, but I really, really like Opiate)
In no order:
Counting Crows
Ben Folds Five
Wilco
Sublime
Allison Krause & Union Station
Linkin Park
Theory of a Deadman
Aerosmith
Nickelback
Three Doors Down
That was very difficult for me
This is gonna be tough to narrow down, I listen to a lot of music.
1.Weezer
2.Dreen Day
3.The Beatles
4.The Ramones
5. Led Zeppelin
Bands:
Genesis (seventies)
Pink Floyd
REM
Kayak
Talk Talk
Solo artists:
Peter Gabriel
Kate Bush
Tori Amos
David Sylvian
Paul Simon
1.Black Sabbath (70-76)
2.Nick Cave & The Bad Seeds (83-02)
3.Bad Religion (85-96)
4.Rollins Band (87-99)
5.Einstuzende Neubauten (86-2002)
Led Zeppelin
Rolling Stones
Van Halen v.1 and 2
Aerosmith
Queensryche
The Clash
Aphex Twin
Led Zeppelin
R.E.M
The Who
This is by no means a definitive list.
My top 5
Belle and Sebastian
the Smiths
My Life Story
X
Cocteau Twins
The Eagles (when I’m introspective or driving)
The Who (when I’m PMSing or angry)
Pink Floyd (when I’m drunk and/or want to screw) 
The BeeGees (when I’m happy or want to bee-bop)
Journey (when I’m cleaning my house)
1 - Rush
2 - Judas Priest
3 - Iron Maiden
4 - The Beatles
5 - Manowar