Being in AFROTC from 1967 to 1971, the lottery had no effect on me. I don’t even remember the lottery nights that others are mentioning. I graduated in 1971, was commissioned 2nd LT, went to grad school for 2 years, entered active duty in 1973, served in Montgomery, AL (flew computers for the USAF), and exited in 1976.
I certainly don’t regret my service to the USAF; the military is a great place to start a career. The closest I got to the VietNam war was my brother (NCSU, 1965, also AFROTC) having TDY’s in VietNam while he was stationed in the Phillipines. He did not want our family to know he was in VietNam but wanted someone to know. He told me to keep it confidential, which I have to this day.