I've lived in "hickory land" since 1986. My woods are full of them. My yard is full of them. Here's my take on them...
Deer do not eat the nuts. I watch deer in my yard daily and have only watched one young buck even attempt to eat a hickory nut in all the years I've been here. It was comical. He tried over and over to crack it between his molars but he just couldn't keep the nut from slipping out of his mouth.
Deer will eat freshly fallen hickory leaves in the fall and the only browsing I see is when a mature tree ends up on the ground, and then they hammer all the buds.
It hinges well but I don't have good success with the upper tree staying alive. It usually dies above the cut, but re-sprouts very well below the cut.
Hickory is my absolute favorite species for the wood burner. High BTU's and holds coals all night long. It's a bit miserable to process it into firewood, though. Hard to split without a hydraulic splitter, and the branches are a royal pain to clean-up. There's a zillion of them and the grab ahold of everything when you try to drag them away.
I also get a lot of saw flies in the wood pile...they don't really ruin the wood for burning but they make a ton of sawdust. Gets a little messy bringing it into the house.
I like having hickory for future firewood, and shade for the house, but there are much better trees as far as deer are concerned.