My favourites are (on playing style):

1) FireSworD - Purely based on offensive playing style and skill.
2) Grytolle - Always a great player, ranging from great tactics, to good abilities, to great timing.
3) CzEcH - VERY offensive, and I really like the small tricks CzEcH surprises people with.
4) Superjazz - Really good team-player, quite a really good duellist.
5) Napoleon - Always good at making the kills, making the scores, and whatnot.
6) Warrior - Pretty threatening as a player, pretty much the same description as Napo.
7) SkulL - Was always really good to have as a partner and would excel on his own. I barely remember how good he was but I remember liking how he plays a lot.
8) Vegito - Probably should be higher, but I prefer other playing styles. Still exceptional.
9) Darksonic - Moreorless an ideal partner in 3v3s, good at scoring.
10) Craig David - Yeah.

Probably misordered/forgot people. Oh well.