Sometimes it's hard to know exactly what to say about a piece. Some people post their work that is so incomplete that the only thing you can really say is "well, keep working on it". Sometimes people post works with so many glaring errors that correcting one or two things here and there really wouldn't do them much good. They need to go back and study more on their own. I can't recall what pieces you have posted, Manok, so I don't know if either applies to you.