i really haven't found any differences between airlines, except maybe united. i will never fly united again because:
1) they're the one that always crashes and shit
2) last time i flew them, our engine literally blew out and i had to spend the night in salt lake city (which was sweet, even though it was summer, because they hooked me up with a tight as room and free meals)
3) they really cram people into coach....i was definately a lot more uncomfortable than on other planes because it just seemed like they squished seats everywhere, not really worrying about comfort
4) the fuckin snack box service is retarded
5) they're the one that always crashes and shit
and for the amount of times that i wished i could plug my ipod in on a flight so it wouldnt run out of batteries, i really do think that the ipod jack is a great selling point. it would be smarter if they put electrical outlets, or a way to charge you laptop