This is hard to articulate but: a pet peeve of mine is when people draw a picture of someone hanging on a wall, but draw the subjects as if they were people looking through a window (as the artist above has done), rather than as images on a two-dimensional surface (as you can see in the image below. 

This is hard to articulate but: a pet peeve of mine is when people draw a picture of someone hanging on a wall, but draw the subjects as if they were people looking through a window (as the artist above has done), rather than as images on a two-dimensional surface (as you can see in the image below. 

(Source: seanhowe, via ghostattack)