I generally dislike moustaches on anyone, regardless of age. They just look and feel a little funny I don't really like beards or goatees either actually. I dunno, it just feels kind of scruffy and I always think that there could be food or other gunk stuck in there haha.
I like smooth, clean shaven skin with maybe a bit of a 5'o clock shadow A few days growth is ok too. Kind of nice and rugged and prickley and also good to use in case I have an itching emergency. I used my ex-boy as a scratching post all the time lol.