[CrypticShift]

> Nothing is perfect.

I agree, and moreover, the more complex the taxonomy, the more likely you'll find people who disagree with it. So perhaps you're right that a simple tags list is the best "simple" solution, and I'm not saying your list is deficient.

One thing I had in mind is allowing an "AND" operator, like searching for "vintage" AND "eq"

> a) usually a "thing" can only belong to 1 category and b) a category often belong in a hiarchy of categories and can only be 1 place

That's why I love hierarchical tags (where tags can have multiple parents) : You can put a "thing" under more than one category/tag while a tag can belong to more than one parent. However, it's true that this is rarely implemented.