(What do I *really* like? I like seat 2K in First class; Seat Guru tells me it is "coveted by many." When I call the airline, I'll ask how much an upgrade to First class will cost.)
Note: You can also ask for a seat change when you check in if the seat you like is not available when you call the airline; someone may have cancelled and freed up a seat by the time you arrive at the airport. Some airlines also offer check-in kiosks at the airport; you can use the kiosk's interface to choose a seat or change your exisitng seat assignment (shown above).
[link=urlhttp://studenttravel.about.com/od/planes/ss/seatguru_8.htm]Enjoy your flight!