Man, I hate working a pin oak that's never been pruned, they are so friggen DENSE with suckers and deadwood, you literally have to almost cut a path up the tree and fight your way down the other side. Not bad trees to work though once they've been cleaned out good once or twice. We have two in our front yard and I've always kept them deadwooded and cleaned up, look awesome compared to a lot of the pin oaks around town.