When I learn something about writing, or when someone gives me a critique about my writing, I start seeing those problems in my writing everywhere. So on the one hand I'm super happy that I got ideas and learned another way to make my writing better, but on the other hand it makes it tough to want to write!
Yesterday, for example, I had some time between my classes. So I pulled up my novel and reread a paragraph or two where I'd left off... and found myself torn between trying to go back and adjust some of my descriptions, or just ignore them for now and keep writing the scene. It was tough! It makes me really happy for the suggestion my peer gave me at workshop... but it also makes me really frustrated because I just want to finish the novel!
Learning about the publication process is tough, too. We talked about that in my class this semester, and it can almost be really discouraging to think that even if I go back and make those adjustments now, there will still be adjustments to make no matter where I am in the novel, no matter whether it's completed or not.
I guess that's just the life of a writer. I'd better get used to it-- better to know now than to have to have the hard knocks of publishing show up all at once!