I'm fussy about fabric and thread. I can't see spending all the time it takes to make a quilt and not use the best I can afford. My favorite brands are Moda and Riley Blake. I've never been disappointed. Their are others as well but it seems I buy these 2 the most. Most of my thread for everyday use is Aurifil.
One thing that bugs me a bit is all the gadgets they sell. I have many that I don't even remember to use so I'm being careful not to buy too many things that look great but get forgotten quickly in my sewing room. That may be just me though. I'm not into gadgets.