I have a critique partner, and she's invaluable. My weaknesses are her strengths and vice versa. She's the only one I share my work with as I'm writing. No family or friends read any of it. If they hate it, I'd be crushed. If they love it, I'd think they're just being kind. Lose/lose.
Always, it's a second mind in the process. Someone who thinks different then you may.
I have a pre-editor. She reads everything I write and does an edit of it before it is submitted to a publisher. To be honest, I am a first draft writer. Other than minor problems, there is rarely little that I have to change when I receive her edits.
Yes, my family and some of my friends.
No. No need to. I know what I'm writing is good and important. (Otherwise, I don't write it in book form. I just toss it when I realize it's not going anywhere important. But, that rarely happens because I have already written the entire book in my head before sitting down at the computer.)
Rough drafts are for the writer. I don't share anything with anyone until the work is at a fairly polished point, usually about three drafts in. Then, see question regarding reader feedback!
I do show my work to others who are strictly readers and not writers to see how my work makes them feel.
I do. There are three very close people whom I trust to tell me what I might be doing wrong. Two of which are authors.
I have a team of friends and associates that review my manuscripts. This only makes my writing better.
Yes, my copy editor.
I share them with people I don't trust, I tend to get more honest answers out of them.
My wife and daughter read everything I write and I share some of it with a writer's group I belong to.
Yes. My wife is usually 1st reader on all work. 2nd &3rd readers are usually prose only.