I don't pick a bass on how well it "sits in the mix" or "cuts through the mix". In a band, it's not my job to stand out from everybody else. I pick a bass that produces the signal best-suited to the sound engineer's goal of making the band sound as good as it can possibly sound. If that means I need to play a different bass, then so be it.
Let me illustrate. Let's say the band's sound is a hex-head bolt, and the closer I get it tightened to the correct torque, the better my band sounds. This type of job calls for a torque wrench. But my favorite tool is a pair of channel-lock pliers. And I think these channel-locks have worked really, really good for everything I've ever used it for. And I've always been a channel-locks guy. And it's got a really sweet paint job and a tort handlegrip. And I think it would make me look cool and impress so many people if they saw me using those channel-locks to turn that hex-head bolt. And I can get it close-enough with the channel-locks. So, in the interest of getting the job done efficiently, effectively, and just plain right, which tool should I use? My favorite, or the right tool?