When posting on a forum today about CAGED guitar books, it occurred to me that there are so many aspects of playing guitar, and so many opinions on what works best or right ways and wrong ways.
I used to think that I had to keep my fingers aligned uniformly a short distance from the fretboard to be able to play solos fast, probably from something I read. Later, when studying up on one of the greatest guitarists of all time, Eric Johnson, it became apparent that my finger obsession was worthless. Ignoring the logic of disciplined fingers = greater speed, Eric Johnson's little finger curls up and flails about when it's not fretting a note in his unreal playing. In spite of my failure to ever get my little finger under control, it was now clear that it didn't matter since one of my favorite guitar players doesn't have control of his, either.
There are so many great guitar players now, and so much training and information available. There's so many aspects of playing guitar that we can spend our time on. We can learn from our favorites, learn songs that we like, write our own songs, work on tone and clean playing, practice various styles that we like, work on scales and other musical principles, learn about theory, picking, chord fingering, and on and on.
The Fretboard Positions Diagram that I put together serves to integrate musical principles and the fretboard. It seems like there's confusion in the guitar world about playing scales and modes, how to apply them when soloing over chords and in various keys, and how chords and intervals are derived and formed on the fretboard. For anyone curious about these aspects of playing guitar, I think the diagram and book can help them considerably.