Well, it depends really. I have over 9000 songs on my ipod, obviously don't listen to them all. It's cliche, I know, but the bands I go back to the most are The Beatles, Rolling Stones, Queen, The Kinks, and Elvis. Mixed in with that would be AC/DC, Beastie Boys, Beck, Daft Punk, The Flaming Lips, Radiohead, and Blur. Of the "current" bands since 2000, the only bands I can think of that I listen to on a regular basis would be The White Stripes (yes tail end of the 90s), Panda Bear, The Shins, and Graham Coxon.EDIT: Forgot Tom Waits.
On second look, maybe your post isn't so...Wait a minute!
For a classic-rock-listening old fart, you're quite the name-dropping ninja.