I have never experimented with my hair. Always let it take it natural course and now i have that typical salt and pepper look. My wife says i look mature and when she says that then there is no reason to worry about the hair.
My mum is one of those people whose skin still look 20 something, despite in her 50s, but in the last 3 years, she is starting to get a lot of greys. I can tell you, when a person have grey hair, but has face that look 20 something, they look really cool and bad ass.