The only thing that's exceptionally well done about this picture is the colouring, look at the shape of her hand - the greatness of her thumb over her fingers and the lacking of length. She looks like paper with the way the poorly drawn bass guitar is "resting" against her shoulder, making it look like it's cutting into her.
We should make that tiny hat the Danbooru uniform. *dons his tiny Danbooru® hat* Some of us may have to use staples in lieu of bobby pins due to our barren pates.
