Sampras and Federer...I think what I like most is that they both just get/got out there and did their job which was playing tennis and, of course, entertaining me (because in my little world, it's all about me). No histrionics (or not many, anyway) although I have heard that Federer had quite the temper when he was a Junior. Guess he's found his "happy place" now.
As for the women...Graf and Hingis. Graf was just a joy to watch, nuff said. I loved the angles that Hingis was able to play on a regular basis. What a shame that, in the end, she forgot about using that weapon and tried to out-hit the Big Babes.