Hi,
The only thing this is missing for me is the ability to create collections. Categories are great for organizing them into genre's but it would also be great to be able to put the comics into Collections.
When viewing a comic it could show some where on the page that it is part of a collection, if you click on the collection name it would show all the other comics in it. An easy way to group a comic series together. A group of issues, etc.
I like your ideas I will think more about them.
You're right, Categories maybe genre. Collections help you create tv series, top movies, valentines movies, collections of Tom Cruise.... bla bla...