Well, of course people here are wary of injuring others' feelings especially if they appear to be just starting out into 3d art; some would rather offer some encouragement than straight-foreward criticism. Also I think many people who post in the galleries are not looking to improve their skill as much as just to get their artwork seen and appreciated. A great place to get C&C is on this forum. I've always found people here to give good and honest criticism and advice. I try to when I feel I can.