I dislike driving carts very much, I think they disrupt the playing rhythm and put me in a state of general hurry which is not good for my game. I prefer walking and surely prefer carrying my bag rather than using a trolley. I believe carrying actually helps with slow play because you get to the ball with all your clubs with you (no need to run back to cart to change if you are not happy with chosen stick) and also your partner can go straight to his ball, thus saving time.
Is everyone carrying a full bag? I carry at times but usually only a half set.