I have never taken a class and I make "artistic" changes aka errors frequently but everyone loves the quilts I make. We are our own harshest critics! I quilt for the relaxing space it puts me in, I hate the basting - the spray makes it easier. I try to work on something with each quilt to try and "perfect" a technique and will repeat a quilt to try and get it right. Even a beautiful "persian" rug has a purposeful mistake because we are all human. Relax and give yourself a hug. Maybe it is being from Saskatchewan that makes us (I was born in Moose Jaw) want to do the best that we can.
Keep up the beautiful work!