Well, living on a boat would weed out quite a few women...whether that's a good thing or not is debatable.
A lot depends on what the boat you're living on looks like. If you're living on a West Wight Potter 16, that's one thing... if you're living on an Atlantic 55 catamaran, that's another.
A lot depends on what condition you keep the boat in. Is it Bristol shape and ready to set sail, or does it have the decks cluttered with random crap?
Another good point Sail. Pride in ownership tells a story of its own.