What makes good feedback/criticism

1. Be short and to the point but not overly simple
2. Pull out key elements of the piece and tell how they impact you (negatively or positively)
3. Suggest improvements, don't be all-knowing
4. Write WHY you wanted to comment on the piece

Answer the questions:
Why do I like/dislike this piece?
What made me click on the thumbnail?
What do I like most about this piece?
What do I dislike most about this piece?
What could make this better?
How did the piece make you feel or react?

Are short blurbs about how cool a deviation is worth reading?
Yes and No. It does have some small value to the one receiving the comment because it (barely) assures them that they are doing work that people like. I believe a simple "+fav" (and actually faving a work) is more beneficial than "dudzors this is soooo cool"... because the later doesn't offer any insight as to why the person thought it was cool. Whereas, just faving a piece speaks to the concerned deviant that the viewer like the piece enough to leave a brief comment and add it to their bank of "these pieces spoke to me" (favorites). Either way it's up to the viewer as to what type of comment to leave. But remember, you can't expect one thing and dish out another---be mindful when you leave your own comments as well.

Writing too many comments that lack substance and variety quickly show that you aren't serious about art and the community, but you also have the right to do what you want-but I and many others won't feel compelled to click on your gallery if you leave "cool!" or "you rock".

I'm just sayin'