It has been some time since I watched Akira. However, I still remember this feeling of confusion that I felt at the end pretty well. There are many series similar to Akira in terms of its topic. Yet, what differs it from the rest is the fact that it does not try to give you a certain answer at the end. Rather, it encourages you think further and further about it. I think that is what I like about it. It such a great anime with a great story, not to mention the art.