Tivo-date.

Your cable company should give you the option of logging your viewing choices to a external server.

Then you can sign up for a dating service that matches you with people who have similar preferences (eg, you've saved and entire season of NOVA but haven't actually watched a single episode - have I got the lady for you!).

I don't know of any functional relationships (romantic or otherwise) where the people involved have drastically divergent television preferences (parents and their children excepted).

I know of a few examples of failed relationships (more roomate relationships that romantic relationships) where television was a major factor in the carnage.