Training in BB is designed to allow managers to create unique players. No skill is completely useless for any position! Here's a rough idea of skills needed for each position:
Point Guard
(1) Handling, Passing
(2) Outside Defense, Driving
(3) Jump Shot, Jump Range, Inside Shot
Shooting Guard
(1) Jump Shot, Jump Range
(2) Handling, Passing,
(3) Driving, Outside Defense, Inside Shot
Small Forward
(1) Jump Shot, Jump Range, Outside Defense
(2) Handling, Passing, Driving
(3) Inside Shot, Inside Defense
(4) Rebounding
Power Forward
(1) Inside Shot, Inside Defense
(2) Rebounds, Blocks
(3) Driving, Passing
(4) Jump Shot, Handling
Center
(1) Inside Shot, Inside Defense, Rebounds
(2) Blocks
(3) Handling, Passing