I learned by ear early on, Hendrix, Clapton, Beck, Page, Allmans, Johnny Winter, Deep Purple, so on. I never practiced scales, I guess I did by immitating others. I still don't sit down and practice scales, I just play and try to make things sound good to me. Later when I gained knowlege of modes, scales, and other technical names for things, I discovered that I was already using them all the time just by playing licks I liked. The one thing I have done is transpose standard positions to other areas of the neck so I could string together longer runs. What i like to do playing live sometimes is to pick a place on the neck that is not where I usually go and see what happens, sometimes sucks, sometimes very cool. To me expression trumps technical knowledge, if you have both you rock. Cool Beans Gene