I know what you mean, but I also get the opposite experience. I'll sometimes learn of a cool show after it's been on for a few episodes or seasons. I like the anticipation of watching something that others have already seen and really liked. It's like being let in on a secret.

I also like when I tell a friend about a show that they haven't yet seen. Watching them catch up is fun for me. "How far did you get last night? Were there any new characters introduced? You're going to be surprised how it ends!"