I agree, the size can be overkill for personal use. Just looking at the LG 43-inch on display at the store it seemed like it required tilting your head up and down constantly.
Large size monitors are nice for reviewing work collaborately (like when you have to cram four people in your cubicle!). I’ve used the large TV’s in the conference rooms to review 3D work and the colors and gradients don’t come across as well.