What is the worst level?

Ok, just a question, but what makes a bad level? How do we determine what level is the worst? Feel free to argue about what level is the worst and say how horribly and utterly wrong I am. I think a bad level needs to be played. It's not that bad if you can just not play it. So what level is the worst? For me it has to be azimuth, do I need to explain?