I started playing at 13, gave up, and started again at 17 (I'm 36 now). My main influence is John Entwistle. Others that peek out here and there in my playing are Geddy Lee, Chris Squire, Billy Sheehan, and Stanley Clarke.
I also very much appreciate lots of other players, including Jaco, Jeff Berlin, Stu Hamm, Victor Wooten, James Jamerson, Larry Graham, and all the other big names (plus some lesser-knowns as well). I'm probably guilty of stealing licks from them on occasion, but I do my best to Entwistlize almost everything I play - usually based on his Alembic and Buzzard eras.
I started with a Vantage bass that looks like a Gibson, borrowed a Musicman fretless for a couple of months, then moved up to a 5-string Washburn, which I traded in for my Epic in 1994. This year, I got my first bass since then - a Rogue. I came to Alembics through Entwistle, and reaffirmed through Stanley and John Paul Jones.