Colouring Drawings with Photoshop

I digitially added colour to a drawing yesterday, and I am quite pleased with the results! I've never altered any of my work digitally before, besides photographs, but I decided to see what I could do with photoshop. Even though I was only using photoshop at a very basic level, it served its purpose well, and will certainly go back with other drawings to alter them, as I found it very satisfying to work this way. The two pictures I have posted show the image before and after.

Please check out my new creation, I've decided to sell him as a greeting card, but certainly would also sell it as a larger print in my etsy shop if there is an interest in it.

Here is the link to the new card:

http://www.etsy.com/view_listing.php?listing_id=30295866