Threads like this muddle everything up... You should have just added your opinion to the other "May" threads... Bad reviews can go in there too you know.
Anyways... the "big deal" with may is that the majority of viewers have really liked it. When you don't "get" why a movie is big it's a simple answer: You just didn't like it as much as most others. That's it, that's all. There's no need to argue, you just have a differing opinion.