I think on some guys stubble is very sexy; but it suits some men better than others though. My DH doesn't look good with it at all becuz he has a small, narrow face; and I have sensitive skin that gets scratched by beards. If you like one, then you MUST keep it tidy and clean; to me, there's nothing more gross than an unkept mustache, beard, or stubble.
MY favorite is nothing; after that, a tiny, thin mustache that you can just barely see like the one Errol Flynn used to have (well kept again, please but so sexy to me); then third, would be a well kept, light stubble. I agree that your wife definitely should get a say even if you find some unexpected benefits on occasion ...
Plus if she hates it, you may pay some other consequences too, like no candoodle for you ...