i like the way the ratings are done in FootballManager (most realistic soccer manager).
u have physical (8 attributes), mental (14 attr.) and technical (14 attr.) categories each on a scale from 1-20 and no overall rating which is very dodgy anyways in sportsgames.
the physical and mental attributes can even completely apply to bball as you might see here
http://3.bp.blogspot.com/__sOLC-jIKT...+performer.jpg