Because we are suburban and at the mercy of a bunch of extremely restrictive Manor association rules (basically we can't cut down, or even trim, a tree (even a dead one*) without inspection and approval from the Village tree commission (which tends to take several YEARS to come by, and usually won't give approval unless the tree is basically rotted sawdust) we tend to burn whatever we happen to get, good wood or not. For I while I guess most of our fires were mostly hemlock, since that is what we had coming down. Now, it's probably who knows, since most of the pile is from times we've split purchased cords with out neighbors. The commission has gotten even slower as the years have progressed and most of the dead trees we have (again, primarily hemlocks) have long since passed into the rotten punk stage (okay for tinder I guess, but we have plenty of waste paper for that). There are a few crabapples on their way out, but they are, rather puny and will probably yield little wood, maybe one or two fires worth. Some of our neighbors have had trees taken down over the last few years, but because firewood IS so valuable, most of the people licensed to cut down trees around here automatically haul the wood away (from their point of view they make a killing, they get to charge for hauling AND get the wood to sell. And if you demand they leave the wood, most leave it in chunks too big to move without a block and tackle, so you get fined by the village when they haul it away themselves.)
* and yes, if a tree falls down and causes damage you are still fully liable. Basically once a tree dies here you have two choices 1. try to take it down yourself (no professional tree service will do it without village approval) and get hit with $5,000 per tree fine for doing it (not to mention the fines for doing work you are not certified to do, and the near certainly of personal and property injury. or 2. do nothing and HOPE the trees do not fall down of their own accord and leave you suable for hundreds of thousands. The catch-22 is so bad you often end up spending a fortune trying to save dying trees you really want to take down (to make room for trees you actually want.)