TV in Common
When two people hate a show, they can talk about the different things they dislike about it.
When one person likes a show and the other hates it, they can talk about it for hours, trying to convince each other why their opinion is the correct one.
But when two people both like a show, there is nothing to talk about. Well, other than:
ME: Hey, remember that time the Galactica jumped into the atmosphere?
JASON: Yeah.
ME: That was awesome.
JASON: Totally.