I really liked our door this year - based on Tolkien's Gates of Moria. A few of us were inside the room one evening when we heard some call out in surprise. We kept listening out of curiosity and heard one of a group say, "Oh, it's in Latin!" Funny comment at a Latin Convention, but I realized that they were yelling in recognition of the Tolkien art and then realizing its connectedness to the convention.
Finally they started yelling "Amica! Amica!" until we opened the door and they cheered, happily proclaiming their love for Tolkien and Latin as they walked away.
By the way, my daughter Ria did the artwork.
P.S. It wasn't an award-winning door, but still received an excellent score towards our overall spirit total.