I actually prefer flying in and out of PHL, EWR and BWI. I like JFK, but driving through Brooklyn and Queens stinks. When I am out in Tysons Corner, a burb outside of DC, Dulles is a good airport to fly out of.
I hate LGA, and avoid it at all costs.
I don't mind Islip, but unless your driving or catching a ride, the train station is on the other side of the airport. And the taxi ride from the train to the terminal is not cheap.