I'm not sure how many people do this, but I sure do. I remember my first bass was a red Yamaha RBX that I named Rose because it was, well, red and I'm not that clever. When that finally crapped out on me, it was replaced with a natural finish Samick that I named Blondie. Eventually had to sell that to make rent, but have recently replaced it with a black Hofner violin bass. I haven't come up with a name yet, but it might just be because I didn't get much chance to really play it before I had to leave town for business. Hoping when I get I'll be able to sit down for a good long time and find out what her name is.