I was hitting with my practice partner the other day, and we decided to do some serves. She suggested that I change my serve. The change would be to kick backward with the right foot and have the left foot hop and land. That's an awkward way to describe it, but it conforms with what the pros do. Now, I haven't asked my pro to do anything with my serve in a long while. We've been focusing on the things that cause me to cough up points in matches (forehand, approach and defensive volley). I know he has said I need to use my body more when I serve, but I don't really want to change anything now as we head into winter and I won't have a facility to practice/groove anything completely new. I think the last time he offered some advice on the serve, we talked about shoulder turn, not feet/kicking, and I never had time to try to take this advice on board. Here's my question: what is the purpose of landing on the left foot and kicking back with the right? Do all good servers do this, and if so, do they do it on all serves?