I have recently discovered Juan Carlos Ferrero as a stroke model for me to follow. Sadly he has recently retired. Other posters have talked about his serve as a good model, but his backhand and forehand seem very good as well. My previous or other models are Safin, Agassi, Federer, and Sampras, albeit at different times when I was focusing on different strokes. I also changed my service stance and backhand, obviously. Who are your models? What entails a good model? Do you factor in body type or playing style? Both?