Guitar + Bass (and a few others)
The first real instrument I learned to play was the violin in the 5th grade. I wanted to play Star Wars(John Williams is the man) and Devil Went Down to Georgia!

I figured out Star Wars, but that other one? Umm yeah....
A year later I got into guitar with an accoustic steel string, and "graduated" to an electric with a Lake Placid Blue strat with a maple board and a kick amp. Thanks dad!
A few years later, once I had a job, I bought my first bass: a SquierII P-bass, black with a maple fretboard, and a Crate B-80XL. Remember those? I bought this because of two things: I'm a huge Iron Maiden fan and Steve Harris got me to look past guitar solos and made me realize that bass is actually very cool. The second thing is that I started messing around with recording some music at a friends house and we needed a bass and started my formative garage band days.
Truth be told, I have played more gigs as a guitarist, or in one band as guitar/keys/vox, but I've only played one gig as a bass player and had a blast doing it. Over the 28+ years of being a musician I also picked up keys and drums, but I play more bass these days than anything else.