I think we should be able to search out all Sci-Fi or any other category we desire in any number of platforms, but I don't think having a gallery specifically for sci-fi, pinups, etc, is a good idea.

We will have people reposting images into these new categories making even more images to look through, not to mention making their galleries look kinda messy.

Under the current system, it should be possible to do what you want with out all that craziness. Just have a genre flag option when you upload an image. Then make a new menu or search that does these genre searches. Then any picture, no matter what platform, could be found using these searches and in essence making a Gallery for whatever category that people want, while still leaving these images in their proper platform galleries.

Course I don't know anything how the system is setup, but I would think this would be easiest for all that are involved...