For the second year in a row... It's the Out of Your Comfort Zone contest (the original, as another builder created an independent contest resembling mine)!
Last year's description of the contest:
Do you usually build in a certain theme? Do you like building in a certain theme the best? Do you struggle with other styles? In this contest, you'll take a trip outside your "comfort zone!" Post your homepage and favorite building theme from the list posted, and get ready to experience something you've been missing.