One catch-all 'Projects' category might work, but I imagine it would get unwieldy with all the subcategories. Then again, having a mess of initial categories would probably be pretty difficult to standardize and find stuff in. So your idea probably works better! Where would Lists and Topic Series (like Contest Stats and Discussion) go though? I don't know if you could consider those projects or not.
I think most people would consider them projects. I personally do. Also, I'm not quite sure what you mean about it being unwieldy. Can you elaborate?
A gif would probably be more than a little distracting, yeah. I was thinking more along the lines of, say, Overclocked Remix's logos, which rotate randomly between a bunch of different video game characters each time you visit or refresh the page. But again I don't know how that would work with Wikia.
I know that a wiki's picture is set by having a picture with the name wiki.png. I don't think it would allow me to set multiple logos. Although, it is possible for someone particularly good with web design and wiki skills to put a logo there with a script or something, but then that could be an issue if Wikia has something against that.
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Zachnorn
Everything = overrated.