I don't sew with my shoes on. Never have. I have more control over the foot petal when I'm just wearing socks, and for some reason, I can think better! Sewing with shoes on is like sitting by a fireplace that has a glass panel between you and the fire. So I always kick off my shoes when I sit down at the machine.
Of course if I'm hand-sewing, it doesn't matter if I have shoes on or not. Haha. So, do you sew with your shoes on or off?