Which custom sheets should be taken down?

[Sengir]

But why bother? They're still both USABLE - the site isn't a gallery of the best of the best, it's a sprite gallery of sprites for people to use.
If something is of a usable quality, why discard it?

Quite true, but what of those sprites that are not usable? I mean, will anybody use this? There are no matching sheets for this, even the size is completely off for anybody to work with. I noticed that some of the fangames people post get bitched at because the "style isn't consistent". I agree with the usability part, but some things just are not usable, even the best of the best.