I know what you mean by the backsliding thing. It feels so crappy when you go from getting good commentary back to forms. Don't let it get you down though. I went through a phase with F&SF where I got a bunch of nice personal rejections from GVG then a whole slew of "didn't grab me"'s and was sure that anyday he was going to boot me back down to the slush. But the last couple I've gotten have been encouraging again--actually, better than the personal ones I was getting before. Just keep at it.