I am a senior in AFROTC. I will commission as an active duty pilot next year, many of the Army ROTC guys I know will commissioning as a reserve officer. Not sure if all dets are that way, but many of my army friend from around the country will also be in the reserves.
ROTC is all about developing leadership capabilities. Being an officer in any branch of the military requires of you to be level headed, critical thinking, and many other traits. AFROTC has pushed me to be a better leader, but quite frankly you can skate through the program without developing hardly anything. It's about you, and your commitment to better your leadership abilities.
With that all being said, honestly which branch would you rather serve in? ROTC will be nothing but a memory once you're in. You don't really know what it's like being officer until you are one. (Myself included)
TL;DR: Go Air Force