Well, it would be no great surprise if I mentioned all the players in my signature... but then, their games are a large part of the reason why I like them. Especially the Sjengster, who works so hard from the back of the court with so few big weapons and yet makes you fight for every ball, particularly on his backhand.
I also admire Srichaphan's sharp, powerful game, and the way he managed to outhit Agassi from the baseline with his short, precise groundstrokes. Santoro must obviously get an honorary mention for the unique style that he displays, but I also like Rios' natural ability to move the ball around and use the angles - when you see him work his opponent out wide with the forehand, you know that the clean winner down the line into the open court is coming.