Tim wrote this book
Treeology 101: How Using a Compass and The Sun Can Reveal Your Stunning Home
so you will know if your home is in a Climax Forest or not, and knowing how much sun each section of your yard gets are the FUNDAMENTAL KEYS to having the yard of your dreams, done through selective culling of dangerous, duplicate, ugly or problematic trees. Then and only then can you consider what kind of replacement trees you want to plant, something YOU decide instead of the builder, the previous owner, or even bird droppings. A planned yard with proper Treescaping, that is, selecting specific trees for their beauty, hardiness, light requirements and space needs, is far superior to a yard with trees too close, trees in inappropriate spaces or downright dangerous trees due to a host of factors the homeowner may not be aware of.