To many designers, consistency doesn’t scream sexy. But to anyone with an understanding of user experience, there couldn’t be a bigger turn on.
When someone visits a site for the first time, that’s a new experience. You can make the experience look and feel the same as others but, ultimately, it’s different because the core product is (hopefully) different. While I don’t believe in walking through the motions, the less a user has to learn during a new experience, the better.
We should design with this in mind.