Numero Unos: Serena and Nadal
All Time: Serena, Sampras, Ferrero, and Davenport
Also like to watch
Djokovic, Murray, Verdasco. F Lopez, Haas, Safin, Baghdatis, Jankovic, Safina, Berdych, and Monaco.
Edit: Can't believe I forgot Hewitt. I like Chardy, Mathieu, Schwank, and Malisse.
Not a fan of Sharapova's, but I do like watching her compete. I feel like she gives you your money's worth.