I've been having a bit of what I call Critique Anxiety.  Yes, from going to art school, I'm very use to crits. I can't even count how many I've had.  I think they bother you the most or shall I say the prospect of them bothers you the most when you feel most vulnerable.  When grounded and sure of yourself a critique is really a piece of cake.  My recent blog post on my personal blog goes into Critique Anxiety for artists and writers, how you can move through it and come to a better, more receptive place: http://stephanierosebirdstudio.blogspot.com/2013/04/critique-anxiety.html