I learned to read before I entered kindergarten. (I actually remember when my mom found out, a couple of months after my fifth birthday. I read the small print off a jar of Kraft's Marshmallow Creme, much to her astonishment. She immediately called her best friend, who was a kindergarten teacher.) I have pretty much had my nose stuck in books ever since.
I was a fixture at local libraries when I was a kid (the Central Valley communities I grew up in didn't have much in the way of bookstores). Berkeley actually has a very fine public library system (despite the post-Prop 13 cuts) - check out the library's bookmarks for a whirlwind Web tour - but it also has 44 bookstores and most of them seem to be doing okay. My current favorite is Black Oak Books (used cookbooks and previously-owned Wodehouse, oh my), followed closely by Moe's, Cody's, and the downtown Barnes and Noble.
I've also been known to go crazy in bookstores when I travel and have to send the extra ones home via UPS. If you're in London, visit the Charing Cross Road and Foyle's; New York has The Strand, Shakespeare and Company, and a host of other fine stores. Portland has Powell's.
I've started hanging out with the gang on rec.arts.books lately. Bob Teeter's excellent homepage has many links of interest to booklovers, as well as an excellent collection of Rabble pages.
My tastes vary wildly, but if you want to see what I've been reading, or rereading lately, click here.
I used to have about five CDs to my name (mostly early music, which I liked before it became trendy). Now that I have a car with a 6-CD player, I have a few more. Berkeley is a great place to shop for this - the out-of-towners usually drool at the selection.