Probably like most vintage collectors my preference for my watches is a dial that looks like it was made yesterday but getting an impeccable, like new dial on a big name vintage usually comes with a big price tag. Patina is a big deal in coin collecting and the right patina can increase the value of an original, uncleaned coin many fold if it creates beautiful, colorful target or rim toning.
Patina, while considered damage, is a matter of preference and for me some patina can add character and create a very unique, interesting and beautiful watch that is just as desirable to me as a vintage watch with a like new dial. Here are a couple of my favorites and I'm sure some will look at them with a different opinion but that's the beauty of the subjective nature of unique patina which is one of the charms of collecting vintage watches. Speaking in a generality, I've noticed some manufacturers seem to have dials that age better than others.
If you have pics of some vintage watches you really like the way they have aged with patina please post pics.
Hausmann&Co with an Ebel 120 movement and an Eterna Centenaire.