The thing that Mica once said that your instrument is (the bass+amp+speakers+cables/effects); it's something you're never taught.
I would hazard a guess that none of us ever decided we had to have this bass or that bass since it would be perfect with the amp we were using, no other reason, just that.
In 30+ years, I've never been truly satisfied with an amp. I've never felt I had a great tone onstage, and I certainly could never hear myself properly amidst the 'sturm und drang' of virtually every band or venue I was ever in. Whether it was a sledgehammerin' loud rock situation, a country band, a corner of the dining room casual, I've never found the sound I heard in my head.
I've been continually confounded by room acoustics vs. bass: The hot spots (everybody else on stage says you're killing them) and the dead spots (any place I was standing). Plus I'd get twangy enough to hear myself and lose bottom end; bring in a nice round bottom, it goes to mud and I can't hear myself properly. And then of course, nobody ELSE thinks they're too loud.
Then . . . does it sound better pushing a small amp into certain tones, or a big amp turned up just to two, I've had it both ways.
I really thought I quit gigging as I didn't want to chase skirts, smoke dope, or drink, thereby cutting my list of possible situations down by 90%. I think I burned out actually as I'm tired of never finding that right 'instrument' in total to where I felt comfortably competent to do it any more.
I am certain though that bigger is better, and like most things I'm a dinosaur in a new world full of 4-pound amps and neodymium cabs. I guess I'll always be tilting at windmills . . . man, this thread pushed a lot of buttons in me.
J o e y