I think it is something that you have to try lots of stuff and decide what you like. I am a 100% cotton batting girl...I have always used Warm & Natural because it's easily available from JoANn's and I can use a coupon on it. I am currently working on a quilt w/ a flannel backing and I wanted a real lightweight cotton batting and I'm using Quilters Dream Cotton Request. WOW!!! The needle slides thru it so nicely!!
Personally, I do NOT like polyester batting. Hard to explain why - I just don't like it.
never have used bamboo or wool.