Let's talk Subjective challenges.

[ORAM]

I would agree with Ariel and Vash, and add that the creative challenges I've been a part of have been some of the most memorable and fun ones. I've really enjoyed doing them even though I don't think I've ever placed above the median value; the actual process is much more interesting to me personally than solving a maze, crunching numbers, coordinating posts, etc. I do admit it doesn't feel good to get scores you feel are unexpected or unfair, so having a specific metric is better. Not so much "best drawing" or "funniest drawing" but something like "most outrageous drawing."