Ed, dig it. Thanks for the thoughts. I'm not quite there, but I have my moments. There are tunes that I've kind of turned loose of the changes on and just play, especially when someone pushes them to another key. I try to get there as well and it's actually been a good year for me in that regard, but, I'm still thinking changes largely.
Bruce, thanks for your thoughts too. Every once and a while I look at something like BeBop Scale, but what I really get out of it is that I can acomplish a similar thing from simply adding some chromatisim to my lines (and trusting my ear as to where and when).
The upper extension stuff, I really like to think about when composing/arranging or when I'm looking for an idea in a solo (usually when I'm practicing). When I'm soloing, mostly I'm trying to just play music. Sometimes, it comes out more musical than others, of course.
But, what I was getting at with my question is I can't really process upper extensions in the context of walking lines. It just doesn't work for me. To my ear, the bass line needs to be closer to the bottom of the chord if people are counting on you to throw the changes down and can be whatever if they aren't. Maybe on something modal, I could think about some 9ths, #11s, and 13ths in a walking line, but outside of the woodshed, I don't think that I would.
Was curious what some of you heavier cats had to say about it.