If your persona is the angry young man, you can work that up to maybe 35.
But then you enter into a tough 15 year period from 35 to 50 where you run the risk that the anger will make you look mentally disturbed and/or intellectually impaired.
At 50 you are safely in curmudgeon territory, and from then on it’s smooth sailing. I’m glad Henry Rollins made it to 50 and went grey. Good for him.
This Gap ad is a hoot.