Personally, I prefer an honest assessment of my work, the "oh how pretty" thing drives me nuts, gives me no direction for improvement, doesn't tell what is wrong with the image in terms of composition or technique. You can be as harsh as you want because after all, one can still choose to ignore your statements if one feels they are being made by an idiot. And I do agree with Overread, there is a difference between constructive criticism and destructive criticism, but then I also feel this is part of the learning curve of photography, weeding out the bad and keeping the good.