I think is is really a personal decision. I have only quilted for a few years, but have sewn garments for over 50. I found out early on that the poly or poly with cotton was the way to go with clothes because of the wrinkle problem. I normally find that the poly or blends give me more control of the fabric when it comes to pressing. I just pick out what color or print I like and do not worry about the fabric content.
I guess I am not a purist when it comes to quilting, but I have always been happy with the fabrics of my creations. I have more of a problem keeping a 1/4 inch seam and not cutting off my points! Technique is my problem, not the fabrics I use.
This board has been a great help to me in trying to master this new hobby.
Phyllis