I use a Stingray-no HH or HS version so just the "normal" Stingray pickup at the normal position.
I really dig the sound.
But all in all, it really depends on what I am playing.
For smoother jazzy stuff I have the treble pot on 0.5/1 or lower to get no "clicky" sound.
For funky stuff, everything is on 10
When I am recording my fretless it depends on the style even more.
Sometimes I want to get a more "upright bass" style sound, so I use the neck single coil,
treble at almost 0 and play most of the time with my thumb (just sounds way more "uprighty" not
sure why-my girl did it like that one time and it sounded cool-even if she isn't able to play one chord on a guitar)
For some "Jaco" style lines-I love my bridge single coil with treble at 0.5/1 or lower.
And if I want to sound like Primus, I use both pickups with all controls on 10.