I think it's a writer...?

Well, if there's one thing I've learned about writing, it's to just Go! Go! Go! Don't stop no matter what! Fill out every thought that crosses your mind, then when the time is right, just take away what doesn't need to be there. Or free writes too, in which case nothing needs to be taken away, changed, or even edited. It's wonderful! It never makes any sense, but it's wonderful all the same.
I'm still so hesitant to let people read my stuff though... Artists Modesty Syndrome? Dunno. I was having a problem like that with a client who wanted a poster design for the play he wrote. I had his name below the title but he wanted it smaller. And in a corner. And the same color as the background. Well, needless to say, I didn't give him that much leniency. But I think a lot of people are like that. I don't mind taking some credit with my art, but writing is a whole other story. Pardon the pun.
I don't know if that's being scared of judgement or scared of rejection. Both, maybe? Everyone wants to feel at least somewhat excepted in the world. The fear of putting ourselves out there and getting shot down is a common one. Sadly enough, I've heard from other writers that critics so nothing for you. Unless their criticism is valid, which it usually isn't. People's separate opinions won't help your writing improve. Even when you get good comments, and some people say your stuff is great while others say it stinks, I've heard to ignore it all. Because chances are, you'll be different to everyone. The only opinion that matters is your own. Well, that's not always helpful either, since writers tend to hate their own work sometimes. But it's better than false criticism or false praise.