If you want a route that's complete, choose Harold (coach Grifter), Chester, or Spencer.
Otherwise, pick whoever appeals to you most. None of the guys are who they appear to be at first glance, and that's a good thing.
Coach Grifter is big and strong, but has a very soft side. He's been hurt by his failed marriage, but that makes him extra eager to prove his affection for a new romantic partner.
Spencer seems like the perfect husky- star tennis player, A student, tutor, and he can't stand the overly sexual Darius. But he has a hidden side, he has a job that no one who knows him would ever guess a man like Darius would do.
Chester is a big bull with some anger issues. The root of those anger issues isn't something you would expect. He has a lot of hidden passions that you can encourage him to pursue.
Dozier is a big guy, seems kind of scary with his lack of talking. Behind that rough exterior is a caring person with a rough past, a love of growing plants, and quite the kinky mind.
Darius comes off as a pervert with tons of sexual conquests and no real thought about other people. Inside he's trying to keep himself from being hurt. He doesn't believe sex can be more than casual, but desperately wants someone to prove him wrong.