Rockets!! 
Also, useful as test prints, after printer changes. Experimenting with “spiralized” (single wall) prints. Exposed the need for better part-cooling, so served as test-prints as I tried different fan/duct designs.
Swapped out the stock 0.4mm nozzle for a 0.8mm nozzle, and more test prints. If your “thing” is detailed prints of figurines (and the like), then you want to use a 0.4mm nozzle (or smaller) and perhaps smaller layer heights.
I am more interested in larger, functional parts. Expected crude results with the 0.8mm nozzle. Got very nice result, including a print so smooth my camera auto-focus had trouble. Going to do more experiments with larger nozzle/layers.
Ignore the iterations on a beer tap handle in back. There is a design challenge from @MatterHackers which inspired a few iterations. New Agorist Tap Handle Design Challenge | Sponsored by MatterHackers
Onwards.