The best one is the HCB picture. "Your problem here is that your AF has focused on the wrong place..."
But I would say this, it is hard, (especially when you first start photographing, and even as time goes by) to not want tack sharp, perfectly exposed, compositionally perfect pictures. Give them a little slack. I am still frustrated by poor focus, bad composition, and just plain why-the-heck-did-I-take-that-picture syndrome. And then we learn that great pictures are more than that. If it grabs, it is great. We learn. So be kind, but not too kind. 😀
Drew