Depends who I'm traveling with. My grandmother prefers JetBlue for the direct flight option.
If I'm by myself, or with someone who doesn't mind, we go whatever's cheapest.
This way, it's been USAir, Continental, and Delta. I think of the three, I liked Continental the best. I can't remember why, though
This trip we're flying USAir down, Delta back. Anyone remember when Delta was the preferred airline of WDW? I watched an old vacation planning VHS, and saw that.
The last time we flew to MCO (out of DTW) we flew with SW as it was the cheapest and was a direct flight. Then they changed and no more direct flights so this time we will be flying with Delta. (We usually drive so we don't have a favorite)