I gotta say, this has got to be one of the nicest things anyone has ever done to a sketch of mine! All that digital inking probably took you longer to do than the original took me to draw.
Whoops, my fangirl-nerdishness is showing again. A Piro complex refers to an artist who constantly puts himself down ("I suck, I'm a hack, I can't draw" etc.). It's a joking term that originally referred to Fred Gallagher (AKA Piro), creator of Megatokyo (at least to the best of my knowledge). So what I mean to say is that my friend is a very good artist but refuses to admit it.