what an interesting question !! I am right handed and unclip with my left foot. I am new to all of this and the only reason I do it with this foot is because this is how DH does it and he was my "teacher." I learned the "pedal thing" by riding behind him and literally, doing what he does, etc. I find that I can push off with my left foot with a stong pedal strong with my stong, right leg which gets me on my way. My left foot usually "finds" the pedal but I still need to look down from time to time.

Afraid to change things up cause who knows what could happen!

Blessings!
Susan