FYI to everyone, this is a Signature of the Week, not a drawing of the week. From what I've been getting from a few of the votes is that drawings far exceed digital designs. If you want a drawing of the week, make the competition yourself.
Anyways, my vote's for #5, Skyerine. I just love its cutesyness overall. To me, graffiti is expressing your creative freedom and it doesn't even have to be letters that are similar to Emy's drawing, for example. It appeals to my eye so much, I just can't keep my eyes off of it. Graffiti is like doodling what you feel and whatever comes to you rmind, and I think this entry embraces it. The touch of Marrilyn Monroe (I think I got the right person) adds the touch of sophistication to the entry, which I love. The bunnies are a bonus for me.