Fan-art is some of the biggest and best feedback any creator can get. (If it is made with understanding and love for your work.
I will not deny you posting here what you see as the greatest receive ever.
But this is beyond the the single e-mail/wall posting single fan-art.
Something more like that.
When someone walks the extra mile, and send it to you.
I also ones got this send by @alliascompany , but only as a picture.
It is still awesome and out-of-the-box thinking.
But getting something physical in your own hands. Is even greater.
