I wish I could be a professional writer, but I'm the kind of person who thrives on feedback...and when I don't have that, I lose interest very quickly.Being a writer myself, and actually getting paid and being published by Penguin, really shifted a lot of my opinions on how I view these things.
For one thing, I realize now that even the shittiest stuff is written by someone who at least had enough passion about it to finish it. And that's hard. So I try not to just completely disregard someone's work like that.