Well nobody really knows exactly what hidden skills exist but one does come to mind from experience and general consensus of experienced managers:
Aggressiveness: How many fouls a player will commit but also how many they will draw. Many managers like aggressive players since they see them as a strength because they know they will go hard at the paint and draw contact every game. Other managers despise these kinds of players since they are known to foul out often and are a pain to train.
2x NBBA Champion: S55, S56. 3x USA Cup Champion: S54, S55, S56. WR for longest home streak ever at 11 in Season 47.