It seems to me that you have two different issues.
The first is artistic decisions (pattern, color, placement, etc.). Those are part of your expression of who you are, and are yours alone to make. If you ask for advice, THEN someone may say something.
The second is the business part of quilting, & i believe that's where Dad is coming in. People who don't have the bug, don't understand why you need more than one quilt. So, they look for a way utilize the end product. He doesn't understand the NEED to express yourself, & only sees the outcome.And,no, you rarely make any money selling quilts.
Good luck, and God Bless!