[Stratcat77]

For many years it was the bar across D-G-B strings and mute E so I could do standard boogie/chuck berry stuff on the A and D strings. I still do that a lot if the song is more of a straight rock-n-roll tune.

But learning James Taylor stuff forced me to use the 2-1-3. I believe that's how he does it so you can get the movements like he so often does. An example is Fire & Rain. Capoed on the 3rd fret and playing an "A" chord position like that and doing the hammer-ons and pull-offs he does in the verses.