What i hate the most, the "OMG! You have grey hair! Dye it or you are a huge loser and everyone will run away from you and laugh in your direction!" I really hate the 'miss hottie' ones. Ugh. Beyond painful.
If you can't tell, my hair is pretty damn grey (if not white in big areas), and has been going that way since i was around 20 or so. I've always wanted white hair, not sure why, but as long as i can remember i've wanted it. Which is funny, because i was blond until around 5 or so, then it got darker, to black, then the white hairs started showing up. Heck, if i was to go pure white, i'd be even happier.
I don't have a problem with anyone dying their hair whatever color if it makes them happy, i've had blue, purple, red, and pretty much every color that exists. It's fun, easy, and nice to look however you want. One thing that bugs me is that the people in those commercials look older to me after they dye it, like you can tell more that their face is aged, but looks "wrong". I won't even get into how they make it seem like grey hair = no job, girlfriend, life, whatever. (i'm going to ignore the jokes about how that kind of fits me a bit, heh)
Eh, it's probably similar to what women go through, Target Women does a pretty good job at describing it.
I guess guys just want sex, and hot women are attracted to these things. ;)