it is really just a personal choice- try both & see what you like. I will say often I use Polyester batting in kids quilts- it holds up well through frequent laundering and is loftier than cotton batting. my absolute favorite though will always be wool batting- it is lightweight, lofty, does not shrink, is soft and wonderful to work with. I use a lot of polyester battings but once in a while a cotton batting is a good choice for my project- when that is the case I tend to turn to Hobbs 80/20. if I want something flat & stiff I *might* use warm & natural. but as a new quilter- try every different batting you find- catch them on sale, follow the recommended quilting requirements and decide what YOU like best- and why.
