any of the batts from the Dream company- Dream wool is my all time favorite- followed by dream poly, Dream orient, Dream bamboo, and dream cotton- in that order-
after the Dream batts i turn to Hobbs- heirloom, 80/20, select, cotton, poly or wool the hobbs black poly batt is a nice one for dark projects
I love the wool batts for their wonderful loft, ease of handling, they needle like a dream, drape beautifully, are lightweight and launder beautifully.
very seldom do i choose a warm & natural batt-unless for a purse/tote, other item- they are so-dense, flat, and heavy- they quilt up ok though i guess- i do have customers who always use them and bring them with their quilts- i dont' mind using what they bring- i just do not choose them for my quilts.
as with many i choose my batting according to the project it's for.