Of those three I'd say Trans States hands down. New management from Comair at TSA has made it a very nice place to work as compared to the past. New leadership in the Training department has made training at TSA a much more pleasant experience than in the past. Yes, Hulas still owns the place but it is a very nice place to work so far. Plus our contract is very good as well with leg by leg cancellation pay. The last two months I would have been down to guarantee without it, instead of getting paid 95 hours a month. Upgrade is pretty quick if you have the time. Right now its about 8 months, and rumors are it will go down to 6 by summer. But even if you get stuck in the right seat, the cancellation pay and pay rates make life bearable in the right seat.
However any regional you go to right now is a crap shoot. We'll see how the next 5 years plays out, but there are some pretty serious changes in store for all of us over the next five years.