But there's also room for improvement. For example, there is no real option to provide feedback on an item's quality (except maybe if you track the skip button presses). I believe a project like this might profit from either a global ranking system or even an individualized learning filter. For example, you often don't seem to get what you selected initially, the system should learn from this for the benefit of other users.
Also, the UI is already very minimal, but could be made even simpler and cleaner, though that may be a minor point.
On a semi-unrelated note: most porn still sucks, and not in a good way. Maybe that's one more reason to explore advanced filtering :-P