I agree with the above posters, especially Thunderbolt's point to select a branch you want to serve in whether or not you get aviation. However, I would be a couple of different reasons why,
1. Let's assume you get pilot.
~ There has never been a 100% winging class out of UPT in recent decades, let alone years.
~~ If you bust out of UPT the military still owns you. They may release you and you can go live a civilian, but they also can turn to you and say you will give your 4-5 years back at a desk.
2. OCS or ROTC for the AF is not applying just for pilot, but all 4 positions. Our friends DS wanted pilot only and placed pilot only (ranking) on his OCS application. Guess what he got? CSO! He went back and sated he never applied for CSO, can he reject it and re-apply for pilot on the next board? Answer was if he said no, than he could never again apply for pilot with USAF. He is now a CSO
~ He was told that for his board only 3 got pilot and they all went to either prior Es.
~ Look at OCS as an easy spigot for them to turn on and off since they are looking not at 4 yrs out like SAs and ROTC, but 6-9 months out. Thus, if they are short on numbers they can open up the spigot, if they have enough than they can turn it down or even off.
3. You do not fly 5 days a week., unless you consider flying a desk 3 of those days is flying.
~ When you go operational you will also get a desk job too. It could be in scheduling, life support, weapons, etc., but you will have a job outside of flying.
4. For the AF you will owe 10 years. See #3.
~ To make O4 you need PME, preferably in residence. SOS is 6 weeks long...no flying time there. They may turn to you at the 8 yr marker and say it is time to take a desk assignment because you have made your 1st gate and we need fliers to fill certain positions. That means for 3 yrs your job is flying a desk.
~~ Yes, I know airlines are hiring at a fast pace, but nobody knows what their hiring rate will be in 5 yrs., let alone 10 or 15 when you are in those time periods.
Good luck.
PS I do disagree with tex about less certain getting a rated slot out of AFROTC. If you fill the squares right than your chances of getting pilot are much higher than OCS.
~ The squares are:
Strong cgpa (3.0 tech or 3.3+ non-tech in college)
Strong PFA (fitness)
Flight hours
Strong TBAS score
Strong Commanders ranking.
My DS' class had 13 get rated 11 were pilot. 13 of the cadets applied for rated, thus 100% selection rate. 1 had eyesight issues so CSO was his only option, and he got that. 1 wanted RPA, and got that. However, I will say that all of them also had every square filled. I believe the national avg that yr for rated selection was @90% nationally. Do not recall would the breakdown rate was for the 4 types.