I primarily hand quilt. I like Mountain Mist Lite for the smallest stitches; Mountain Mist Blue Ribbon because it doesn't beard and handles well. I recently completed a quilt with Hobbs Polydown, and I was impressed because it was easy to quilt, a bit puffier than the Mountain Mist Lite, and when the quilt hung at a show, it was very flat - no wrinkles or ripples.
Right now, I'm using Hobbs Premium Wool, and I like it...but I'm reserving a full opinion until the quilt is finished and hung.
Battings I don't like are Quilters Dream, the lightest weight - yes, it was easy to quilt, but there was no puff to add contrast to the quilting. I also didn't like Warm and Natural, or any batting with scrim, because it's too hard to hand quilt. I also don't feel that it loosens up to fill spaces between stitching lines.
Janet