I have been playing the bass uninterruptedly since 1969 and have used, abused and owned so many basses that it's hard to remember. Through my hands passed Fender, Ibanez, Yamaha, Hofner (beatle bass), Peavey, Kramer (the one with the aluminum neck), Steinberger (the headless one) and even an Alembic. Notably missing is a Rickenbacker although I was loaned a 4001 of a week or so.
I still keep 2 Fender Precisions basses, 3 Fender Jazz basses (one converted to fretless a million years ago when Jaco was still alive), a Rondomusic 6 stringer and a few Jazz Bass Asian clones. I will be crucified for saying this but I'm old and I don't care what most would think. I'm truly in love with a cheap (very cheap) Jazz clone that weighs an absurdly low 7 pounds. It sounds like any other passive Jazz and lets me play it all day long without any sign of shoulder or right thigh numbness.
Concluding, for me the most important attributes in a bass are: Tone, Weight and Cost.