Maj T:

The Air Force usually does not care what your major is. I'm an engineer, but lots of guys were political science, criminal justice, radio and television; you name it.

For ROTC and OTS, showing dedication..through good grades, instead of sloughing-off and partying...seems to carry more weight. They also like to see participation in team-sports (working together for a common goal), and show blatant favoritism to team Captains and quarterbacks. (Supposedly shows leadership potential).