I have no issue with men wearing wedding rings if they want to - DH chose to have one but my Dad doesn't.
I don't mind leather necklace things or wrist things (bit hippy, I have no issue with that).
What I don't like is the thick ostentatious gold chains that look like they'd knock you out if they swung in your face, ditto the huge signet/sovereign rings.
But each to their own.