Movie 11, hands down. I didn't get it and that was why I didn't finish watching it. Just looked at the beginning and scanned the ending. It was coincidentally the one I missed, which I'm glad of, because if I watched it first I wouldn't have bothered even looking into Detective Conan. I wish they would have Gosho Aoyama write the movies, everything would be much better than.
Movie 12...it was okay, I suppose, but it wasn't really that interesting. Movie 14...I thought the beginning was pretty good but the ending kind of...blah.