Laurie Ruettimann is The Cynical Girl (I thought she was the cynical HR girl). She always tells it like it is, without any sugar coating. Read this post: Passion doesn’t always mean profession.
I agree that you should, to some degree, want to like what you do for a living, but the idea of simply following your passion and making a living off of that… I think it’s a bit too Pollyanna for most people.
Follow your passion… or not?