I too use my pinky, although my guitar teacher doesn't like it. He says the pinky should be kept free to play other notes if needed. I just love how easy it to play a Barred E-form and drop right down in the same frets to Barred A form esp, the G/C combo for "Bertha". Also the last joint on my pinky has so much more mobility than the ring finger and can bend almost completely backwards so it doesn't cover the high E string the way my ring finger does. It just is so much more comfortable but I practice it the other way as well and am getting the hang of it (sometimes).