well i checked out your hubs...and it seems like you like drawing animals...perhaps you should move to drawing women. i know you asked for a reason ... well the thing is that i am into drawing and sketching too and i somehow, am always drawn towards drawing the female form. It is just that I feel that each and every female body has a story to tell so perhaps you should try your hand at drawing them too.
the profile picture that you can see of a girl smoking has also been drawn by me...i did it on facebook using the application called Graffiti. there i did the whole drawing with my mouse. :)