If you are having timber cut - have them take everything that is of marketable size, that you are willing to part with. many loggers only want the high end stuff, because they make more money in less time. However that thinking is a great way to have all sorts of large mature junk trees that do nothing for you but block the sunlight. My first timber cut was a recovery from a high-grading cut that happened before my time. All my oaks where crowded by large ash, cottonwood, sycamore, hackberry and other general junk trees. I made some money, but we only removed the trees I said could go. This past summer they returned and removed the walnut as the price had recovered from when it was down during the previous logging. I only hinge cut smaller trees, larger trees are far more dangerous to hinge...If you want a large tree removed and the logger doesn't want it, I think it is best to simply cut it down for firewood or simply let it rot. I retained many oaks and yet the newly available light has caused an explosion in the understory. Logging is a great tool when properly applied. I removed lots of hard maple, ash, hickory, poplar, hackberry, sycamore, and other stuff. We did cut a few oak, cherry and the like, but they where damaged and at risk of only further decay. You also have to understand what you want moving forward. if you want to totally change the trees you have growing you will be looking at essentially a clear-cut and having to replant what you want. If you want more of what you have then a selective cut can get you there.