So I'm not sure about the technical end of this question, and you folks seem to be the most responsive and educated folks on Gaia, so I thought I'd post my question here.
My thinking is I would love to custom tag items with lots of specific tags, and then just use a logical search (this+that, this OR that, this NOT that, etc.) to find stuff to put on my avatar. Custom tagging my inventory would be a huge undertaking, but once done I wouldn't have to try to remember where I put things any more.
Obviously there is a technical flaw to my thinking because even though tons of folks have asked for it, and Gaia has tagged a few items, it is not universal.