I've always been into black/gray-tattoos until I saw the design for my first one. The tattoo artist did it in color and it just blew me away! Since then I clearly prefer colored tattoos. :) The raven with the rose you got there looks absolutely awesome! And I really can imagine that the death hawk moth will look fantastic as a tattoo! :)
Maybe do your sleeve in glack & grey and just the fox in colour as an attraction? And hey, can't wait to see the moth plan realized!!! Love that place for tattoos, also thinking to tattoo my whole tummy up to the chest but keep the chest clear / free ( thought a different way for many years... )