I have completely shaved my head to raise money for cancer research last year during the month of February. I had hair that was about 5 inches past my chest, so it was a drastic change. Currently it is past my shoulders by about 4 inches. The rate that your hair grows back is different for everyone. I know that my friend who did it with me has hair that is a bit longer than chin length. I'm planning on doing it again this upcoming February, so you don't have to worry about being the only bald on here! ( :
Yeah I shave my head against the grain with a razor. It's alright. The only thing is, some people seem to be a bit intimidated by me at times! It feels physically comfortable, and after a while you don;t give hair a second thought.
Slick bald? No. But electric razor bald. Yes. It felt cool, literally, and you could always feel a mild gust of air. The amount of time for your hair to grow back depends on your hair growth rate and how long it was when you cut it off but for me it took about 2-3 months to be able to comb it. You should try it but the best time would be the summer.
I have done this on the summer, because it was hot, and I wanted to try on a new look... I thought to my sylef..."it'll grow back if I don't like it.." I don't mind doing it... I shave it completely almost every summer, I could say that it grew up to a "medium" looking hair in 3 months...