My daughter is a firm believer in the Never Ending Series. She refuses to watch the last episode of a series, so that way the series never ends for her. She says it's because she gets emotionally attached to the characters in the series, and it's too difficult to bear when it's over for good. The only exceptions she has made to this is Sherlock and Doctor Who, because she just couldn't resist watching all the episodes available (and since they are both continuing, they're not technically the LAST episodes).
I can totally relate to this, I hate it when a series you have come to love comes to a close. Is this where I mention I still haven't watched the last episode of Firefly?