Been a singer and rythm guitarist for ages (actually since '78). My old band had petered out due to children, houses and generally changing priorities.
The drummer joined a new band that were to focus on playing covers of Sweet (brittish glam rock band from the 70-s) songs. They needed a bass player and a singer.
My brother - who was also in my old band - was asked if he would try the bass, and initially said yes.
I got invited as a singer and said "Hell, yeah!". When I was going to the first rehearsal, I was told my brother had chickened out. For some odd reason I had an Aria Pro II bass hanging on the wall, so I brought that along just for fun. I wasn't really expecting to play anything but the occasional root, but found to my complete astonishment that I played a passable bass immediately

, while the singing was decidedly rusty

(not helped, probably, by my constant looking at the fretboard).
This is half a year ago, and it's like the bass was lurking in the shadows, waiting for this opportunity to posess me. A month ago we had our first gig. Singing went really well, and bass playing too. I actually enjoyed tplaying he song the guitar player sang lead vocals on the most, because then I could totally rock out!
There's no looking back now, and I just got Todd Johnson's "Technique Builders" DVD. Just imagine: For thirty years, I never bothered to practice guitar, I just learned the chords and played. Now I'm totally devoted to learning this properly, and acually find my technique to be OK, even if there's a million things to improve.
Rune