Story Archive suggestions

I'm working on an upgrade to the Story Archive. On the list of new features is a search/filter function. A user could search for stories based on certain label attributes and see only stories that had certain labels and/or never see stories that had certain other labels.

So if you don't like popping stories, you could filter on that. Or if you're looking for male inflation and don't want to wade through the entire archive, could search on that label. If you want to find all of the stories where women fill with helium until they're as big as houses, you could do that.

Right now I'm trying to develop a good set of labels to categorize stories. Please offer any suggestions if you think anything is missing here, or if you think I've included something that isn't worthwhile. The big question is, what categories would you want to search by?

So far I have the following labels and their categories, with some descriptions filled in:

Subjects
* Female Inflation
* Male Inflation

Size
* Normal - Within the range of size that a human being could achieve
* Big - Larger than humanly possible
* Huge - Room filling size
* Gargantuan - House sized and larger

Means

* Mechanical - Pumps, air tanks, breath
* Chemical - Medicine, helium pills, NFP and the like
* Magical - Spells, potions, curses, etc
* Technological - Science fiction technology, e.g., nanites, software

Medium
* Helium
* Air/Gas
* Liquid
* Other

Circumstances

* accidental - Inflation is unintentional
* intentional - The inflation is deliberate, and the subject of the inflation is willing, at least at first
* nonconsensual - Someone is inflating another against his/her will

Sexual content
* Mild
* Moderate
* Explicit
* Weird
* m/f
* f/f
* m/m

Popping
* Clean - Popping occurs "offscreen", or is depicted in a way that is not gory
* Messy - Gory depiction of popping: blood, innards, etc.