Hahahahaha!!!!! The Air Force has adpoted stretch pants for it's troops. I guess the PT program isn't that popular....
Okay, kidding aside. I'm not a fan of the ACUs. I like the uniform cut but the camo, velcro, or the zipper for the tunic. I would love to get a set of ACUs in the Multicam pattern or in Woodland. Also I would have it with button for the pocket flaps and also buttons for the tunic itself.
A uniform cut that has gotten my attention is something called Aviator BDUs. It was a design that I was a GI wearing while I was near SouthCom. He was a Blackhawk pilot and told me that the cut was design to replace BDUs but the production run never got that much support. Instead he said they were issued to Helicopter Pilots. I have never seen that pattern of BDU cut ever again.