Greetings,
I'll try to add my 2 cents. I'm pursuing a military career, I applied to the USNA and USAFA (AFA wait-listed me, USNA shafted me) and AFROTC and NROTC (once again, the shaft from the navy, I guess I'm too much of a land-lover). I looked into the USMC, but AFROTC gave me the scholarship, so I'm joining the det at AZ state.
I know if you walk into the ROTC bulding and join either AFROTC or NROTC (don't know about AROTC), they won't pay for tuition, but they will give you a stripend ($250 per month first year, $300 second year, etc.) and if you graduate from college you will be commisioned into either the AF, Navy, or USMC (if you do NROTC Marine option). I also know that if you do well in college, they may pick up your tuition down the road.
Personally, I wouldn't listen to an enlisted recruiter. I was at some Civil Air Patrol thing, and an AF C-130 pilot with ten years on active duty said he has only known 5 guys in the AF who crossed from enlisted to officer, because, as he put it, it's really difficult to do your AF job for hours on end, then go straight to school. He also said that the needs of the AF come first. So if your class meets at 9, and you have to report at 8 taht day, then you're screwed. My grandpa was a CMSGT in the AF and he said it was ridiculous, so I'd take their advice.
I don't know much about the Guard though, maybe that is a great way, but with the current Iraqi situation I'd standoff a bit if you want to finish school soon. Personally, I was hours away from signing into the Marine 92-day reserve program, but my recruiter made a phone call and found out that I could be deployed. He promptly told me, but if he hadn't, I'd be in Iraq in a few months.
At least sit down with a ROTC officer and talk to them. They will give you straight answers, because, generally, they don't have to recruit officers, enough people want to do it voluntarily. I mean, the AFA had 15,000 applicants for 1200 slots this year, and ROTC had 16,000 applicants for 2,500 scholarships. Also, ask about OTS. I'm pretty sure the navy gives the same consideration to each pilot candidate, whether they're from OCS, NROTC or USNA, but the AF gives a lot of consideration to AFA officers, decent consideration to AFROTC, and not much at all to OTS. And in the AF you have to commit before you know whether you got into pilot training. I'm sure this is all accurate, but ask to be certain.
Also AFROTC has a weird way of picking candidates. Your major doesn't count for very much, but almost all scholarships are in technical majors. However, your commander's recommendation is 50% of your score, and if you have a hard major then I've heard your commander will give you more leniancy. I've heard rumors that this may be changing and that majors will start playing a bigger role, but they're just rumors.
However, if you go Navy OTS or USMC PLC or OCS, they will guarantee pilot slots before you sign the dotted line (not sure about NROTC or USNA), but something like 60% of their fleet are choppers.
I've looked at this from a thousand angles, and there isn't an easy way to become a pilot. Good luck though, I hope to see ya out there.
-Ace