Do you view your writing the same way you look at your critique partner's writing? Are you unbiased when reviewing your manuscript? This is something writers need to learn. We can't disconnect completely from our work, but we need to put some distance between us and our words. If we don't, we won't be able to see everything clearly. We won't be able to cut words, we won't hear the things we need to hear about our stories, because we'll think our book is the best it can be. We'll know that NOTHING needs changing. And most writers understand that their books can be made better.
From that first draft all the way to the final edits we cut, prune, add, take away, all to make our book the best it can be. If we fall in love with our first draft and think it couldn't be any better we are doing ourselves an injustice.
I remember when I first started writing. My first picture book wasn't awful, but it wasn't brilliant either. But I thought it was. To me that book was just the most marvelous book that had ever been written. YIKES! Did I have some things to learn. But I hadn't yet learned to distance myself. Now I know to look at my story through my readers eyes. Read it like they will. Now I can see the words that need to be cut and the scenes that need to be energized. How about you? :)