You guys know who you are. No music theory training. Precious little in the way of technique training. You can't read a note of music and you don't use tabs, but you are a good ear bassist who can pick out or make up the bassline on the spot and can jam with almost any situation. What bad habits have you discovered that you developed over the years? Something that you work around now and is just part of your individual style. Or maybe something you had to fix to get past a pleateau in your development? For me, I think the biggest habit that I've had to try to overcome to be a good showman as well as a musician is not looking at the fretboard. That's now a pet peeve of mine when I go see a band - guitarists and bassists who never look up at the audience and look like they are having fun. I also was too tied into some limiting right hand techniques, so in the last year I've really had to develop picking and finger style techniques in order to work up new material the way it was supposed to sound. Not a big deal except I've been playing for 10 years! Things would have been a lot easier if I had learned a few things early on that I didn't.