I don't currently have a preference regarding who we should target with pick #21. Ideally, I'd be looking for a one-dimensional player who has an elite, NBA-ready talent in one facet of his game. Something like shooting. Rebounding. Defending. Passing. Athleticism.
Lots of times, one-dimensional players are passed up, and they fall into the 20s only to let them explode on some random team. Happens every year.
We don't have to settle for that at 21 .. but it's an astute observation. So often, you just need to call on a guy to do one thing better than anyone on the court.. have them practice that, own it.. and you can depend on it.