Hey all,
Good luck! Don't fret if you don't receive the 4 year HPSP, I was #3 on the alternate list last year and although I didn't get a 4 year I did get the 3 year without having to reapply (just had to resign some paperwork) and didn't have to reinterview or anything. I found out a month into starting my first year, which was a huge relief. The same thing happened for another guy in my class, who was not ranked on the alternate list.
I may be a bit biased because I grew up in the AF but you're definitely applying for the right branch! Any HPSP would provide exceptional opportunities for your career, but living situations are a lot nicer with the AF. Feel free to PM me if you have questions about the program!
UW School of Dentistry 2016
3 Year Air Force HPSP recipient