Balance is something every head coach wants in his recruiting class; however, he also has to know where his roster needs more depth.
Recruiting is about projecting as much as it is about evaluating talent. Coaches have to project where their rosters will lack bodies in future years, and they have to make sure crucial units have higher numbers than others. Also, based on the type of schemes teams run, they need more players at certain positions.
Examining many BCS teams' recruiting classes, it can be seen that several programs are loading up at certain positions. Alabama wants to stock bodies in the trenches, while Baylor is adding more offensive firepower on the perimeter. Plus, Arizona State will add a lot of players to its secondary.