I am also well into the 'Geezer' club, old age is not for sissies!
I have long hair that just touches my shoulder blades, thinning but still thicker than most young people. If I want to be male, I let it fly wild or put it into a low ponytail. If I want to be female, I let it fly wild, put it into a high ponytail, braids. pigtails, messy bun, or even curled and styled.
And I don't really care much what anyone else thinks, I fix my hair for my own pleasure.