I've seen some serious omissions from most of these lists so far, so here's mine.
1) Chris Paul   -  straight up pimp
2) Deron Williams   -   takes over, does it all
3) Chauncey Billups  -  strokes 3's, physical
4) Steve Nash  -   when healthy no one makes their team better, even with horrible D
5) Jose Calderon  -  true point guard, never turns it over
6) Devin Harris   -   slasher, good defender
7) Jason Kidd  -  still gets it done, clutch
8) Monta Ellis  -  crazy fast scorer, if he shoots better gonna be a stud
9) Rajon Rondo  -  on any night can explode in pts, rbs, stls, asts...needs to learn to shoot more than layups
10) Baron Davis  -  extremely physical, can take over games still
11) Gilbert Arenas  -  streaky.  when he's on, 40pts, when he's off 12TOs
12) Mo Williams  -  Shoot 3's, get it to LeBron
13) Tony Parker  -  FAST.  hurt a lot, put up better numbers on shittier team.  Sexy Wife
14) Jameer Nelson  -  only seen one real good half season out of him, lots of potential
15) Derrick Rose  -  decent all year, was awesome in playoffs, still young will move up a lot