One thing that I seem to have a problem with is watching new movies that come out in the cinema or playing the latest games in a series I like because I haven't completed the first two beforehand. For example, I will not watch The Avengers until I've seen each member's individual films (Just need to watch Hulk 2008 and Iron Man 2).
Sometimes it's okay to play a game in a series if it's not exactly chronological, or if it's an RPG (e.g Fallout 3, though I won't play New Vegas until finishing that)
And I just have to read any book chronologically written before the one I want to read, otherwise the story makes no sense whatsoever.
Do you have these issues too? Discuss them here.