Well, I've seen postings that were more of a character assault than a comment on the item. And wouldn't it be more productive to say what was wrong than to say something "sucks." Saying that there are seams in a texture that shouldn't be there tells the person who created the item what is wrong. It "sucks" says nothing except tells us something about the commenter's vocabulary, or lack of it. "I prefer four fingers to three," lets the person know that your comment is a personal preference and really has nothing to do with the quality of the model. It "sucks" says the person hasn't thought through their complaint.