I find I'm very picky when it comes to fan art. It has to look like the cartoon, or I seem to dislike it.
Also If its a animal I can't stand when people make it human, or worse change it's sex.
I also dislike when people turn everything anime style.
I get everyone has their own styles, and I can respect that.
But at the same time the shows have a style their own, and shouldn't be shoe horned into other peoples style.
Or maybe I'm just a jerk?