So you're reading a book, or playing a game, or watching a show, and while you're not exactly turned off, you find yourself kinda bored. Nothing about the work is bad, per say, but it just isn't grabbing you. It has some potential, but seems kinda tepid. And yet, everyone harps on about how great the work is, and when you tell them you're not that into it, they tell you, "Ah, man, you just gotta get to [insert chapter/episode here], and then it really takes off!"
True or not, there's a point at which some can only slog through so much mediocrity before they just drop the thing or start speed skimming to the supposedly good parts. Some find it worth the effort, while others find the experience ruined because by the time the good part happens, they just don't care anymore.
What your all's policy on "it gets good later"? How far in are you willing to read/play/watch something before it either impresses you or you give up? Do you suppose the fact that people sink time into a series influences their later enjoyment, (as in, maybe the "good parts" aren't that great, but they seem amazing compared to the previous boring parts)?