I watch it now and again, my roommate is a big fan but it seems I'm always busy when she's watching it. So I get a little lost but I still enjoy it. And I haven't decided if I'm Team Castiel or Team Dean.
That said, while I like the show, I completely understand why anyone who isn't watching for the mythology, the lolz or Dean's abs wouldn't like it, they can get really whiny and over dramatic.
Oh, and another thing I do like about Supernatural is the fan love.