I really can't stand beards and moustaches on guys, especially the bushy kind, especially when not a very nice colour and especially when on men with a lesser than average amount of hair on the top of their head.... Yuck!
They seem increasingly popular, especially with 20-30 somethings, though. Unfathomable to me. Am I alone in thinking this way? Too old? Too prudish? A bit of designer stubble is the most I can tolerate, but hate how spiky it feels on DH.