Like you said in your post, I have done the opposite myself and I started out a designer creating pixel based isometric-style web designs and slowly converted i

Like you said in your post, I have done the opposite myself and I started out a designer creating pixel based isometric-style web designs and slowly converted in to a developer. I'd say it's more than possible for someone to become a designer after being a developer (my co-dev who is a designer is slowly learning PHP and knows HTML/CSS fluently).