JetBlue has been labeled as a low cost carrier, but they are really more of a high-service carrier than most of the other airlines. to start with, they offer more legroom - everything aft of the exit rows offer 34" of legroom. They also have direct TV, and on the smaller Embraer planes also offer XM radio. They don't serve meals (who does?), but they do serve soda and snacks. From my personal experience they have better help, and they do pretty good with luggage and on-time arrivals.
The to drawbacks that I find arew that their flights are almost always full, and that you have to book through their website.
Oh, one other thing - in Orlando, they offer rear door loading and unloading, so if you sit near the back of the plane and don't mind stairs you can board and unboard out the back.