5* on Rivals and 247.
But seriously, work ethic and character are probably the top two. There's plenty of athleticism around the country, but these are the two things that really set kids apart aside from the freak athletes who are just going to dominate no matter what.
Need 1 or 2 true leaders too who can lead in recruiting other players and then lead in the locker room.
Regardless of him being a 5*, a Duke Johnson type is the guy you want. As obvious as that is.
Also if they happen to have a hot older sister, that's good information to have as well, but not a requirement.