I think I use B. When you look at the animations, rotate the character sideways to get a different look. It does a better job of showing you how the animation steps into the shot, how long the backswing is, and how far in front his contact point is.
I use forehand C and backhand motion C also. I feel those motions are more of a driving motion than the others and I fell it gives me more pace on the ball.
wow....ive been playing this game for over a year now and did not know you could swivel the character when you determine the animations....lol--now i know how you guys get so much cross court action...motion B---boy, i tell you what