I grew my hair out right after retirement. Lots of hair, chicks dug it. After a few months, long hair was more trouble than it was worth.
I like it, my wife likes, my kids like it. The women ooh and aah over it.
The only people who don't like it are old men who can't grow it themselves. I think they call that jealousy.
It was such pain in the arse to grow it out, I'm not cutting it off anytime soon.