Most of the guys I know, married or single, are concerned about the color of their hair. Either they color it back to its natural shade, "do the roots", or constantly discuss its color and whether they should get this product or that product. "Something to touch up this little part here" or (don't get them started) beards or moustaches.
It's not that their hair looks bad to begin with even. I think they just want to make darn sure that they have the approval of their entire set of friends and family before taking action.
The men not interested in hair color are invariably going on about their receding hairling, fending off jokes about it, dodging the facts with elaborate combovers...
No, I'm not just talking about gay men, either. :-)