Lost my motivation

Well, I'm struggling with my motivation at the moment. I have three drafts for short stories for TMA02, all well developed but not finished, but I can't help thinking they are stronger stories than elegant writing. I feel as if this uneasy balance between 'genre' and 'literary' is the elephant in the OU room. I was happy with the short story I wrote for TMA01 and it got good marks. Nothing I've written since is as reflective or unusual. The time lines are linear, the characters expressed in the third person form a single POV, the tension builds predictably, there are twists at the end. Nothing like the 'literary' short stories that I am reading. Given all the stresses and business of a crowded week, I suppose I'm doing all right, but I want my enthusiasm back. The TMA squashed that a bit (even though I did well). I just don't want to hand my baby over to be dissected, though the comments were extremely helpful. Perhaps I just need to get on and make the changes my tutor suggested and have a look at where that lands me. Meanwhile, I'm blue, playing with chapter 5 and working with my drafts. I just want to wallop out 1500 or 2000 words in a rush of first draft enthusiasm, not get stalled with 'Oh, what's the point, it's not good enough' fears. I might work on my poetry again just to get going.