Going to be moving to CHS in a few months, right now I'm at BOS, so I can choose between carriers to earn miles. CHS has UA, CO, DL, AA, SW, but all of my flights will be connecting through a hub. I know all of the complaints about mile value, award redemption, status benefits, etc. How have you MPers decided which FF program to go with for your small airport: closest hub? most departures? other?