I like a lot of players but I'll stick to the top five(active and retired). Here goes:
1. Rafter: I love his serve and volley, chip/charge attack game, especially in '97-early 99(before shoulder injury). Not only was his serve so effective then, his volleys were crisp and assured... and he had this great passion for the game and warrior like mentality that showed on the court. When he went out to play, he went out to win. And he's so generous and kind off the court and his personality is so adorable...I could go on...
2. Hewitt: At first I wasn't sure I would like him, despite the hype, because there was so little TV coverage on him. When I finally saw a match, I was immediately impressed by his energy and passion for the game. I especially loved the fist pumps and come-ons. I love how he can look like he is going down...then manage to turn the match in his favor. He never 'tanks' a match.
3. Haas: I was initially indifferent to Haas because there was a lot of hype but no real results. But I saw him playing live about two years ago and I was blown away. I love the one-handed backhand and the variety of shots...he can hit the ball really hard and also finesse it. He really can do everything, it's a shame he hasn't won a major yet. He needs to have a consistently reliable serve...each time I've seen him lose an important match, his serve let him down. Funny enough, another thing I think is holding him back is his mental strength...but I do like to see his temper on the court

. And his looks don't hurt.
4. Moya: When Moya won the French Open and was number one the next year, he was demonstrating why I like him so much...he had a great forehand, was fast and fluid darting around the court, served well...but then he had that horrible back injury and the slow comeback including a short bout with extra poundage and 'spare tire syndrome.' Thankfully, it seems like the real Moya is back. And he is pretty easy on the eyes too.
5. Guga: What can I say...he is such a lovable character. He seems so easy-going and laid back on court, almost like a goof with his rangy body and bebopping walk and mop top( I loved the wild hair days the best), yet for some reason, when he's going after the tennis ball, every goofy movement has purpose. And he seems to do it all with such ease. Here's to hoping for a full recovery from that hip surgery!