Definitely going grey. I have a full head of hair in my thirties and I absolutely love it. Greys are coming thick and fast though so good old Just For Men is a regular purchase for me now

Bald can be a good look also but this is very dependant on your head shape.

However, if you are hugely balding and what hair you have left is entirely grey... you may as well just get a native American Indian to scalp you.