Wow...this topic is old. I'm gonna revive it, 'cause my sound has come a long way.
Since I started the topic, I've started playing with a very light touch and hugely incorporated tapping, harmonics, and chords (sometimes all three at once

). I put SD Hot for P and J pickups in my bass, an Aguilar 3 band preamp, Leo Quan Badass II bridge, and switched from using D'addario strings to TI Jazz Rounds. I also recently acquired a Yamaha fretless (BB404F) and put TI flats on it. My sound on the two are very, very different (I consider playing both as playing two different instruments, because fretless has so far been a completely new monster to take on).
On both, I usually keep the neck pickup at 100 and the bridge at very low, and the play between the two. The neck pickup on the yammy is a jazz, and the fretted is a p, so there's obviously huge tonal difference there. Tone's all the way up on the yammy, and there's no tone pot on the samick (vol/vol/3bandeq). I was never a big fan of the jaco-nasal thing, but there's a perfect mix of smoothness and grind with the settings I have on it right now. For when I do harmonics, I do jaco-nasal, just so they pick up better (neck pickups, IME, is a crappy place for picking up harmonics). There's some hardcore mwwwahhhh on the Yammy, too. I honestly didn't know what mwah sounded like, because I'd only ever played one fretless before and that was once, two weeks into playing

. Now...I get it completely. This bass has mwah up the wazoo, and I love it. I find it easiest to scope out what a person's individual sound is when they improv, and when I do it, it's all about the bluesy-grooves and chordal tapping. There's just the subtlest hint of grind on both basses when I tap, but it's much more pronounced when I go into finger style. It adds a neat touch that you usually don't usually here when I do solo-y jazz type stuff on the fretted, but it totally works.
Slapping sounds completely different on both, when I do it on the fretless, a lot of the time it sounds like Primus. On the fretted, it's a really controlled type slap sound -- not wild and aggressive like Flea, somewhat closer in quality to maybe Stanley Clarke. Sometimes I boost the bass and treble a little bit to be a bit more aggressive.
EQ is almost always flat -- almost a shame, considering the money that went into the aggie, but it's been indispensable in covers for stuff like Motown and slap. The mid knob connections weren't done correctly, so I honestly don't use those yet. Through certain amps, I mix in some treble and do a bit of bass cut on the fretted 'cause the p pickup can be a bit bottom heavy (except through my Yorkville, which is a very tight sounding amp -- great investment, that was).
Any of y'all change your approach in the last few months?