I'm shortly going to be an STL to IAH commuter. There are only 4 ExpressJet and 1 Chautauqua every day, which has me just a bit nervous. The downside of course if that you could probably commute much easier on Southwest, but then you've gotta find a way to get from Hobby to IAH. If you're going to a Continental hub, EWR is actually easier from STL because there's mainline, Shuttle, ExpressJet, and Southwest all going. But I was fortunate enough to get a spot at a pretty senior base so I'd be hard pressed to give it up to voluntarily go to EWR for the commute alone. Maybe eventually...