What I listened to:

0 to 6 yrs : Classical, mostly Bach, Dvorak, etc.
6 to 9 yrs : Jazz/Swing etc, Ella Fitzgerald to Motown
9 to 11 yr : Pop, Abba, Michael Jackson, classical again
11 to 18 y : Heavy metal, maiden, priest etc. NWOBHM then Metallica et al.
19 to 22 y : Clapton, Dire Straits, Buddy Holly, Beatles, old blues, grateful Dead
23 to 27 y : Grunge, Alice in Chains, Pearl Jam, Soundgarden, Hammerbox etc.
27 to 32 y : Classic rock, from Heep to Fleetwood Mac, some metal, Black Crowes, Faith No More
32 to 40 y : back to 80's metal, but mostly modern rock bands like Foo Fighters, Danko Jones, Scandinavian sleazerock (Turbonegro, Gluecifer etc.) and an eclectic mix of all I ever dug from iPod, except I can't stand Jazz and blues no more, at least in larger doses.

What I mostly played:

around 18 - Metallica, Maiden, Priest etc.
around 20 - Beatles, CCR, rock ballads, blues, grunge
around 30 - pop-rock, rock, post-grunge
around 40 - rock-metal, grunge