This show seems at first to be all about girl power and proving that chicks can be just like Bond, but in the end it's an awful lot of the teenage girl stereotypes of shopping, shoes, friends, boys, cluelessness, and who knows what else society has told this demographic it's cool to enjoy. For those that don't really fit into this group, it's just painful to watch.
This should really be lumped in with Christian television, seeing how the overbearing angelic plotline has drowned out the basis of what the show began as: monster-of-the-week badass save-the-day type of thing. Even Charmed introduced angels and demons, but that didn't become the entire point of the show. There was a new villain every week with Charmed; with Supernatural, it becomes endless development of the same issues. If that type of thing is your cup of tea, then by all means, go for it, but for people that like dynamic shows, this is probably not the one for you.