This was posted by a GM in a Help Forum, and I thought it would come in handy to have it here. Haven't tested everything, but it's pretty accurate.
PG - Point Guard
(1) Handling, Passing
(2) Outside Def., Driving
(3) Jump Shot, Jump Range, Inside Shot
SG - Shooting Guard
(1) Jump Shot, Jump Range
(2) Handling, Passing
(3) Driving, Outside Def., Inside Shot
SF - Small Forward
(1) Jump Shot, Jump Range, Outside Def.
(2) Handling, Passing, Driving
(3) Inside Shot, Inside Def.
(4) Rebounding
PF - Power Forward
(1) Inside Shot, Inside Def.
(2) Rebounding, Shot Blocking
(3) Driving, Passing
(4) Jump Shot, Handling
C - Center
(1) Inside Shot, Inside Def., Rebounding
(2) Shot Blocking
(3) Handling, Passing
Makes team assembling a lot easier.