I mostly use Hobbs Heirloom batting for quilts and Pellon fusible fleece for purses and bags. (Those brands are what we sell at the LQS where I work.) I like the drape of the Hobbs, more soft and fluid than some of the other batts I have used in the past. I did buy a black batting once, I think it may have been Quilter's Dream, that worked very well for a very dark quilt. I hate, hate, hate polyester because it makes quilts too stiff and unnatural, it beards and mooshes down over time. I used a wool batt once and loved it because of the easy way it needled. But, it can be pretty expensive.
The fusible fleece gives purses and bags body, makes them stand up on their own better than batting, I think because it's denser, and I'm sure because of it's being fused to the fabric.