Regionals:
CHQ
XJT
Skywest
ASA
Pinnacle
Mesaba
Comair
Colgan
Mesa
(in that order, actually)
Majors:
Southwest
AirTran
Continental
Delta
Northwest
jetBlue
US Airways/America West
United
(also in that order)
Honestly, as long as I have a job, am being compensated well and can support my family and see them occasionally, I'll be happy. The trick is getting all that together in one place....