for solo stuff, i'm very messy, i know i certainly have the skills to play pieces cleanly. but the bottom line is i don't practice the stuff enough (one of the things i'll be working on this year), there's a few pieces that i can't play even half as good as i could a few years ago, even though my overall playing has improved.
for band stuff, in a rehersal or recording setting i think i'm very clean, i've been focusing on my technique here for the last couple of years, and have achieved a level that i'm very happy with. very soft picking, excelent damping, good punctuation and pretty much flawless left hand technique for the pieces we play in the band (this is no doubt helped by my simpling down of basslines i write). but take it into a live setting and it usually goes out the window as i'm often (but not always) very active when i play. so the soft right hand goes out the window as does the accuracy of the left. it's not bad by any means, just not on the same level as in the rehearsal room. but i'm not bothered as the difference is small enough as makes no difference to anyone in the audience (who's not a bassist ).