I have grown my hair back several times. I usually go for a sharp flattop. I never made it last a couple of months before taking the razor to my head. Part of it is the white hair, I think it makes me look so old. I also get a dermatitis condition on the back of my head that completely goes away if I shave daily.
Bottom line, I love sporting a shaved head. Everyone I know thinks it looks good on me, and I enjoy the morning routine of shaving. No plans of growing hair again.