Whatever... it's a matter of opinion.
I think that over half of the ppl that see it are not going to like it. Only a few do get Shyamalan's movie making style.
Some say that Signs was a horrible movie 'cause the story was naive or silly. That doesn't make the acting any worse or the directing any less artistic and unique. People kind of forgot the real point of the movie as they got distracted by the alien stuff, which is not what the movie is really about.
The Sixth Sense is a exception because it's not that challenging. Don't get me wrong, it's still a GREAT movie... one of my favorites I might add.