finished bus station designs

i am quite happy with the finished outcome go the bus station designs i understand that they are different shades of grey, but once they are all on the windows they will be the same colour, and it will not make much difference.
 However i think the superhero one is rather tacky and i with i could have redone it so it fit more within what we set out to do rather then just be some random bit of work theta doesn't fit.