I don't agree with using 3Pt FGA% as a measure of how a recruit would prefer to go to a particular school (would you really want to go to a school who jacks 50% of their shots from beyond the arc but only makes 20% of them).
Anyway, my collected data so far for Perimeter preferences are:
Very Good starts around 42.5% and above
Good around ~35.3%
Neutral at ~29%
Bad is somewhere between 23.1 and 23.69%
To calculate your percentage, take your Total 3PT FGA and divide by your Total FGA (as shown on your Team Stat info).