I'm asking because it's an interesting question that - like fashion and style - is very subjective.
My 83 year old Dad thinks you're a youngster at 60. My 16 year old nephew thinks you're ancient at 40 (YES. Greg and I are old folk to him). You were old at age 30 in Medieval times. And now in 2015 - 50 year olds look more youthful than ever. But medically you're classified as older when your ovaries are old.
I have no clear cut answer for my own question other than that the goal posts shift as you get older. I welcome your respectful thoughts on this sensitive subject.