My first bass was my 1976 Rickenbacker 4001, which I still own. I bought it about 15 years ago, because as a big Motorhead/Lemmy fan, I'd always wanted one and a sweet deal, that I could just not say no to, plopped itself into my lap. At the time, I was still playing guitar in my band(s), and I never had any intention of switching to bass... that happened pretty much by accident! I was in a dual guitar Metal band and we couldn't find a bassist. So, since I owned the Ric, I started filling in on "bass". Really, I was just playing rhythm guitar on bass. I plugged the Ric into my Marshall guitar stack, and played with full-on distortion. It sounded like Lemmy's sound on steroids, so I was happy, heheheh... anyway, over time, I got to enjoying playing bass a lot, and after a couple of gigs playing bass, the band and I both came to the same conclusion: it worked really well as a 4 piece, and I should stay on bass.
Cheers!