HEY! Great thread. This is exactly how I developed all my open G playing. I love it but never really had much confidence in it feeling that it must be wrong or although it sounds great to me and seems well received. I just fit the 'chords' to the feel of the song. The only downside is that my memeory works better with 'pictures' and the old sheet music with chords over the lyric are much easier to remember. Songs now for me don't have any of that. I just work it all out as the song gets carved into shape.
Anyway, thanks for that I feel much better about my stuff.