There are a lot of people who liked Ergo Proxy immediately after they saw it because it was different from all the other anime cartoons that are always sweet or about superheroes. This is about the life of humans and robots when they are able to coexist with each other. It is possible that you like the way this story came about and you are still remembering how you liked the series a lot. Do remember that you may be able to remember it even better as you place this as your computer's desktop background. It is possible that you will like it tremendously.