I absolutely agree with Kathy! But in my experience and what I found out in more than 20 years of hand quilting practice the thread count plays an important role.
I try to find fabrics with a thread count of 150 (that means 75 threads per inch in each direction), they work perfect for me. I also used batiks (thread count 240) but it was quite heavy for me to quilt through. Some patchwork fabrics have 120 or less - they are too coarse for me and my quilting stitches.
You see: the best thing is to try and to find your own preferences.