For me, I have decided that I need only one tone for what I do. I happen to currently use active basses with soapbar pickups, and they provide me a tone that is useful for all of the different styles of music I play (jazz, urban gospel, r&b.) I have a fretless Jazz that I may use for some things in the future, but at the moment, it's just for fun at home. Although I have owned a whole bunch of basses, I think I have always been a one tone guy. I have always tended to use one bass for most of the music I played at any one time.