I made one using flannel as the batting. It looked great, but the sleeves were very stiff. If I made another I think I wouldn't use batting/flannel in the sleeves. I ended up turning it into a vest which I wear all the time in winter. It's very cozy.
I have also made jackets out of sweatshirts, making sure to use a sweatshirt larger than the size I normally wear. I cut the sweatshirts apart and down the center front, then decorated them with patchwork.