Exactly how important is having a teacher? I've been playing for about 4 years now. I had about 6 lessons when I first started, and my teacher wasn't even a bass player, just a good guitar player teaching bass, which was ****. So anyway, that was crap, so I decided to just teahc myself. So, now, 4 years later here I am, doin' pretty well I think but I'm wondering if it would make a big, positive, difference to my playing, and would there be significant improvement if I got myself a bass teacher?