I'm not speaking for Aaron, but I'm a tosser 'n turner and I do so in a quilt. In fact, I've used the quilt for years and don't intend to go back. I guess I should clarify: I would definitely use a bag in certain conditions, or if certain high end bags "fell in my lap"!
Aaron is very creative (search his older posts for some really cool gear). I suggest a tapered quilt unless you're going to use it in a hammock, for sure. Or steal Aaron's! I currently use the Golite Ultra 20 (no longer in production).