Recent research has shown that there are certain comments that are supremely constructive and help any artist to improve their art regardless of what needs improving. These comments include, but are not limited to:
"It's cute"
"I love your style"
"*huggle*"
"
"
"aww ur so awesome"
"ZOMGZ SO KAWAII"
The following, however, are NOT good critique and in no way help to improve the quality of the artists works:
-comments and tips on ways to improve anatomy
-remarks on fails in common logic in the character
-comments on the physics in play in a picture
-comments on the patterns or colours used
-tips for using other tools to improve the quality or presentation of the art
Further discoveries:
-Disabling commenting improves the art more than learning to draw
-Blocking people makes you improve faster then listening to their advice
-Hiding comments instantly makes you better, especially if you don't read the comment first