I took a class from a well known teacher. I was making a Christmas quilt and she told me that I couldn't use red and green together because the eye would see brown. I told her that I was making a Christmas quilt and that did not seem to matter to her and continued to discuss my use of red and green. And I thought about all the quilters out there who were using the wrong colors for a Christmas quilt. So I left at the first break. Did not take another quilting class for many years, but eventually I took a class with a wonderful teacher. I regret not taking classes all those years because of one bad experience, but was very happy that I did not stay at the first one!