Bad gouge about all mil aviators coming from service academies. I was an NROTC guy, and I'd say at least half of the folks in my squadron (pilots that is) are from sources other than the academy. The only requirement is a commission. Yes, there are a few more pilot slots available to USNA or NROTC applicants than their OCS brethren, but there are also less OCS accessions overall, so that factors in. Bottom line, get into a commissioning program, do well in college, pass a flight physical and whatever battery test your service requires for pilot applicants, and then get accepted to flight school. Many do it every year from sources other than the academies, and there is no reason to think that you couldn't as well. Good luck!