I don't comment too often on artwork here. I do it sometimes when it's posted in the forum and requested (and if the person is newbie enough that I think my small offering can help). But I've long since stopped commenting in the galleries because it seems to have become a place where one posts something to get accolades (only). From my point of view, similar to dialyn's, a critic can look at art from the technical point of view (I mean things like balance, composition, whatever that is called that refers to dividing the "canvas" into thirds, some other geometrical devices for composition, etc.). It works the same no matter how the piece was "drawn". So, comments based on the time-proven theories are, well, more "factual" in basis. On the other hand, as mentioned above, I think any critic can make remarks about their interpretation of a piece. If couched in the terms of, "Have you thought about this?" or "To me, it seems like it needs..." or "Personally, I don't like the trees in this piece.". I don't see anything wrong with a person expressing some personal ideas about what they think might improve a piece. I like to hear them because it might be something I never considered adding or removing. A fresh viewpoint. So, I don't get bothered or insulted by those kinds of suggestions. And if one is given to one of you and it is completely NOT what you were trying to do with your piece, just ignore it.