Bricks Cascade

Hey guys, give me some suggestions for the art/mosaic/sculpture award categories for Bricks Cascade. I'm coordinating that theme, but based on info I've been given/my experience coordinating the Other category at BrickFair, it's going to be art-like things such as mosaics and sculptures, but there will also be a bunch of other random stuff that doesn't really fit anywhere else. Like tapeworms.

Right now categories I have as ideas are:
-best mosaic (will be a category for sure)
-best sculpture (also will be a category for sure)
-best vignette (same with this one. These first three are auto-ins)
-best/most artistic
-best use of colour
-best MOC based on a franchise
-best/most random thing
-best/most abstract

So, please suggest nixings or suggest category ideas as you see fit. I don't want to have a ton of categories, but I also don't want to leave something blatantly obvious out. It's kind of hard to judge when there's very few registered MOCs for Bricks Cascade, so deciding on things like "best  franchise-based MOC" is pretty hard to decide. I've been looking at the BrickFair categories and they tend to keep it pretty clean and tight with the categories and I would like to mimic that here.