why is that james?
well... flats I want thump and minimal sustain. The heavier gauge slows me down some and combined with a bit of foam under them at the bridge... make a glorious thud.
For my basses with rounds (all besides my fretted 5 with the flats) I want clarity and expressiveness. I discovered Rotosound's FM66 set in the mid 80s and generally stuck to .090 or .095 E sets of stainless rounds ever since.
Currently my fretted 7 wears .118 .088 .064 .046 .033 .022p .016p
and my fretless 6 wears .124 .092 .068 .049 .035 .025
I don't tap, fingerstyle is 80% of my playing with some slap and pick filling up the rest. I use a medium high action to reduce fret choke and allow for a dynamic range of finger attack.