I have a minor request/suggestion regarding subjective tags if it were to be implemented someday, but which could work with pools instead as well. I suppose it belongs to this thread.
The whole idea is about ordering the current subjective pools growing out of control by relevance.
Say every image can pretend to a maximum of 3 subjective tags/pools (or 2, or 4, whatever seems to be enough). The same way users can vote on images right now, users would be able to vote on each subjective tag attached to an image, when they think it fits.
Then you could perform searches on subjective tags and order the results by tag score (or choose to order subjective pools by pool score in case of pools).
That would be a way to find the most popular images in specific fields, and to avoid any clutter with posts that have a lower relevance in that field (read: pool abuse), since they'd be at the bottom.
The subjective tags/pools would be set by the uploader. In case the uploader didn't set any or left some slots, priv+ users could fill the others, but the ones set by the uploader should stay locked (the uploader keeps priority over other users). At any moment, the uploader would be able to edit any slots. If emptying a slot or changing its tag to another, the current vote value would be cleared.
All users can vote, members included.
Since members can only vote in fields trustworthy users have selected, abuses should be prevented well enough.
Currently trying to figure out if votes should only be positive, but I guess abuses would exist in both ways anyway.
I don't know how the vote data in the database looks like (I'm assuming a counter and some sort of long string of voters IDs ensuring no-one votes twice), but I suppose it should be light enough too with the slots limit (with possibly more restriction on members).
As minor as it can get, should it ever reach the roadmap, I think it can be pretty convenient to handle current subjective pools contents on a wider scale (being able to actually search for hot legs and getting thousands of ordered results, finding the most disgustingly adorable material without the massive clutter resulting of the pool's progressive degradation, without the add/remove wars, and so on).
tl;dr
Tag your image with hot_legs.
People agree, they vote that tag on your image.
Months later—hundreds of hot legs images by various users.
Perform hot_legs order:tagscore search.
Get that many popularity ordered results.
Woah, it's better than pools.