Originally Posted by erik-the-red
John McEnroe won seven singles major titles with one grip: the continental. He used it for his serve, his volleys, his forehand, and his backhand.
That does not mean you should use one grip only, though.
The modern game calls for multiple grips for multiple occassions.
A low ball? Try a tick more east than usual. Medium? Go semi-west because you get power and spin. High? Go full-west.
But to answer your question, pretty much all the clay-court specialists utilize a full western grip (e.g. Gaudio, Nadal, Massu, Gonzalez, etc.).
You know, my full-western forehand grip is morphing more toward continential grip now. I don't really have to change much to hit my one handed backhand. It's very convinient. Perhaps I should stick to that. We'll see how it goes. Thanks again for the info everyone.