^^ I'd have to agree with Mahi there.
Had Sam and Dean only been hunting then the show would have become predictable and they probably wouldn't have reached this far. They introduced good tracks at appropriate places making sure the show got picked up again after every season. They tried their best I believe to keep the show as interesting as it was ever before and to see to it that it doesn't lose its charm. But like any other show, it had its phase of ups and downs. But the fact that they're still going strong and the show still has potential to deliver good stuff is what made me stick to it. :)
