I like these designs! My husband is helping me analyze these and although I really like the one with the key (ranked 9th), he says something about the key doesn't sit right with him. Wondering is there a way to make another version with a differently shaped key but otherwise the same concept (i.e. the key being the vertical line of the "k"? If it helps, his comment was that the key seemed too "old world" to him. I am not very creative so hope this info is helpful! :)