I use Warm and Natural on most of my quilts. If someone gives me some other batting or I find a 75 cent bag of batting at the thrift store, I will use it on small items or practice pieces. For my 'real' quilts, I prefer W&N.
I did do a batting test earlier this year, and discovered that the bamboo batting that pellon makes handles in a similar fashion to W&N, so I would use it if W&N were not available.