Not too many people have mentioned beech. I'd say that and ash are my favorite depending on how cold it is and how long of a burn time I want. Beech splits nice, almost as easy as ash, but has about the same or a little more energy per volume than sugar maple, which is also something I've found is very nice for long warm fires. I love putting a 12 or 14 inch round of ash on my block, in the middle of the truck tire, and just going around with the splitting maul. 7, maybe 8 easy hits and I have 8 small chunks. Cherry burns hot and quick, smells good. Elm as anyone knows is miserable to split especially if it is cut standing dead, has been dead for a couple of years and is bone dry. It's like iron. Ripped with the chainsaw into chunks just small enough to fit in the stove it's good for overnight/away from the house at work wood because the big pieces burn slow and long. I tried a little dry hemlock and could barely get it to burn at all for some reason. I guess I never really noticed how much ash is left, ash management is not that big of an issue to me. I guess we're really lucky with the hardwoods in the NE USA... It's really a choice of better and best, not much of it here is really that bad...