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It's good. The picture shows the personality of the person. It is drawn by introvert person. He/She requires time to develop connection. He/She prefer to stay alone. Probably drawn when he/she was in bad mood.
Are you going for realism or more a cartoonish style? It looks fairly alright.
It's between decent and good. Could use work definitely but for sure not bad.
I like it, random and quick sketches are always my fav.