I don't know - I personally like these short challenges - it forces me to just pick an idea and do it instead of overthinking and being precious about it.  I don't know about anyone else, but when I have more time I just keep messing around with it endlessly, making never ending little changes to shaders and lighting and camera angles.  It's nice sometimes to just take something "just good enough" to get across the idea and throw it out there.  That's not to say that I don't spend thought and time on these, but I'm not worrying about meeting some internal standard of perfection when there is a rapidly approaching deadline.

This week has just been a bit crazy.