My natural light brown hair eventually all turned what is technically grey, but looks more platinum - so don't bother dying it.
People with dark hair seem get a more steelish grey color, light haired people seem to go lighter.
Men with grey hair look fine to me, and if they want to dye it, go ahead, as long as it looks natural. I find the older man with completely black or brown dyed hair could look very artificial and sometimes it might indicate too much vanity in that area. Many movie stars and actors only wear their hairpieces and dyed hair for their roles.
People with dark hair seem get a more steelish grey color, light haired people seem to go lighter.
Men with grey hair look fine to me, and if they want to dye it, go ahead, as long as it looks natural. I find the older man with completely black or brown dyed hair could look very artificial and sometimes it might indicate too much vanity in that area. Many movie stars and actors only wear their hairpieces and dyed hair for their roles.