Top ten bands or artists blahblahblah, it's pretty self-explanatory...
Metric
First song heard by them: Monster Hospital
Song that got me into them: Empty
Who got me into them: The Paste Magazine CD sampler
Current favorite track: On The Sly
All-time favorite track: Empty and/or Hardwire
Radiohead
First song heard by them: Creep
Song that got me into them: Karma Police
Who got me into them: 99.1 HFS
Current favorite track: Fog
All-time favorite track: Karma Police
Broken Social Scene
First song heard by them: Capture The Flag
Song that got me into them: Lover's Spit
Who got me into them: Random find back when I still had winMX, I was trying to burn a halo LAN mix and searched "Capture the Flag"
Current favorite track: Backyards and/or Windsurfing Nation
All-time favorite track: I'm Still Your Fag
Elbow
First song heard by them: Not A Job
Song that got me into them: Powder Blue
Who got me into them: Internet find in 2002
Current favorite track: My Very Best
All-time favorite track: Red
The Arcade Fire
First song heard by them: Rebellion (Lies)
Song that got me into them: Rebellion (Lies)
Who got me into them: MTV
Current favorite track: Neighborhood #3 (Power Out)
All-time favorite track: Neighborhood #2 (Laika)
Kings of Convenience
First song heard by them: I Don't Know What I Can Save You From (Röyksopp Remix)
Song that got me into them: Little Kids (Ladytron Remix)
Who got me into them: David Halstead
Current favorite track: Sorry or Please
All-time favorite track: Know How (featuring Feist)
Yeah, I don't really have ten favorite bands. Sorry, I know if you're reading this you're probably pretty bored and/or procrastinating. Like me, putting off leaving for work. :(