This has been an interesting thread. I guess I am one of those guitar players who cannot articultate what he does with his left hand ('cept to say; It's one of these, without the F#)! I use a lot of variation of the chords I play and rarely know the names of them. I also love the sound of holding one note of one chord, into the chord of the next - and there are many combinations of these 'suspensions' I use. My chord modifications usually result from experimenting with melody or harmony lines within the chord pattern of the song (which sounds like what Mike is talking about above)My musical education took a turn away from the books when I was young. I might have learned a lot of theory the hard way since then, and probably not so well ... but I always find it easier to play along with someone who is talking theory, then I do to communicate what we are doing - and I don't see my ignorance as an advantage!
This thread has been helpful for me. Thanks.