I hate middles. Writing them is like a murky bog the sun only shines on occasionally. Of course, if I planned out my novels scene by scene ahead of time, I wouldn't have that problem. But that method would ring every last bit of imagination from me and by the time I started writing I would have lost all enthusiasm for the project.
It's funny, though. Every writer I've heard who uses detailed outlines thinks they are the only way to go, while those who don't believe it's a matter of preference. Maybe the latter group is used to thinking outside of the box.