The white background works great. I would like to see Art spelled out with real life things. Something Iconic, the Eiffel Tower, R-???? something real life, maybe a gate railing and the T something strong like a bridge to compliment the A for balance.
Another thought I had was using the NYC skyline for Creative, made up by the shadows with Letter underneath and real life photos that make up A, R & T. The Free Mason symbol is really cool and it would be neat to create my own. C. L. A.
I like the format of entry 5. You almost hit it on the head with 22. Change the R to a water pipe that craves down. Maybe stronger colors as well. Almost like a test print from a printer
I still like your 60 the best but it is lacking one thing, "Creative" needs to be Creative! You have Art just right, Letter is all about letters and Creative is just spelled out……nothing creative about it. Maybe one letter in place of one that is a thing.
I definitely want color for ART. Keep in mind it must print well in Black & White for my boxes. Can you change A to red, R to yellow and T to Blue? This will scream out "Creative Letter" ART in color utilizing the spectrum.
Try an inverted version to, black background colored things or color background with black things.