I haven't been to Crotched when they've had more than like five features set up, and Pats has been making some slow improvements the past few years. With Loon's college pass, which I think is around $400, it's definitely the way to go if you can make the trip consistently.
Also, as a Concord local, which is where FP is, Pat's is unquestionably the closest of the three small mountains for me; I've made the trip in precisely 16 minutes before.