Buzzed college Junior here. I started losing my hair freshman year. I was eating breakfast, and a female friend of mine simply said "you're balding." I've had friends make fun of my receding hairline, and another girl ask me to lift up my hair so she could see the damage. One day swimming at the pool, a girl simply said "oh my god, you're bald."
However, my roommate freshman year had a shaved head. He was bald by choice, and at the time I never thought twice about it. I never really heard anyone mention it to him either. He was BBC, but still. As a balding guy, I got more comments than my roommate did as a bald guy. I am still working up the courage to shave my head. Maybe this year...
If you look around, you'll see a ton of guys in the beginning stages of MPB. As when you go out, you see tons of guys with smoking hot girls with MPB or a shaved head. Like everyone here attests too, it's all about self confidence. My girlfriend says she never even noticed guys hair until she heard me gripe all the time about balding at 20.
Personally, I'm more worried about potential employers than what my peers think. Hopefully that works out this year with regards to internships and whatnot.