There's certainly a lot to be said for physicality.
Harkless has it, Qmiller doesn't really
Waiters has it, Terrence Ross doesn't
Beal has it, Jeremy Lamb doesn't
Robinson has it, PJ3 doesn't
Wroten has it, Doron Lamb doesn't
Royce White has it, Moultrie doesn't.
Melo and Nicholson kinda have it, but Nicholson didn't really show it until the second half of his senior year.
So much of the game is the willingness to get into the scrum without thinking, without fear.
There's a lot of softies in the top 25 picks.
Some real bruisers as well though. Waiters, White, and Wroten are the toughest, and Harkless is pretty tough too.