If that's the case, I think a generic, all-encompassing booru for western stuff would be preferable as opposed to just limiting it to waifus, or even obscure waifus.
Not just because of the increased utility of being a more comprehensive repository, but the ambiguity of trying to objectively qualify a character as a "waifu" would be confusing. Or even "obscure"--we have differing opinion on that too.
I think most of it would be screenshots too.
On that note, I just recently discovered the Reference Emporium. Has anyone here had any contact with him?