Gollum: Digital painting in GIMP

I decided to try my hand at digital painting. for this I used another great Open Source application :Gimp
this is my first proper digital painting actually. took me about 2 days.

I always hear people say that Photoshop is the only choice when it comes to digital painting. Well I've never really worked in Photoshop and I'm not a pro, but it seems to me that Gimp has totally got what it takes....