My number one bass came about from many years and many basses. 6 strings. 2" nut width borrowed from Modulus. 16.5" spacing from much trial. 33" scale and chambered for a warmer sound. My second custom bass, and third in total, from my good friend Brian Ristola is a bass that bass players play and envy. It didn't start that way. It was originally brighter and stiff. After some pickup and preamp experimentation, and some years of being played a LOT, it has become something truly special and irreplaceable.
About two months ago I received, after four years and a failed prototype, my Martin Keith semi hollow 6 string bass, and it is quickly becoming my new/co number one. It will get most of my time no doubt, but the Ristola is more on the electric side, so it will absolutely have it's place. Both absolute gems. I've never felt such ease and such joy from playing the bass guitar as I do with these two.
Also, Steuart along the way convinced me to go passive, and then that voice made me reconsider my having put a preamp back in...now my basses are all passive. That has been a big part of getting a sound that I love as well.