AA and SWA questions answered.
Just to add a little to the last question. Guys will ask for a different runway for a number of reasons. Some of witch are: on landing, get the runway that will be closest to your gate. Ask for the opposite runway to avoid a downwind and get a straight in approach (wind permitting), on takeoff, ask for the runway that will get them airborne the quickest, ask for the opposite runway if it leads to a straight out departure in the direction they are heading, again wind permitting. Usually this only happens at fairly small airports or in the early hours of the morning at larger airports. (If even then)
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Denny