I'm not so sure. I've had some BAD DMs... Didn't do movement. Didn't own ANY of the books. Once he owned the Monster Manual, he totally ignored CRs. We fought against one of each kind of evil dragon, all adults or older. We were are 4th level, I was fourth level. He was a sheild guardian. His brother was a pegasus. He had 5,000+ HP by the end of the adventure. He granted us immortality. We were ninth level by the end of the fifth adventure. And that's not the half of it... >.< Uh... I had a point when I started... kinda lost it. ^_^;