I've worked in shops that were a box with no outside light or views. It was an awful prison. Humans need a view of the natural world to soothe them. In addition to a short view outside, people need a long view as well. I would plan my work stations so that at least some of them had these views. Natural light is important for vitamin D to keep you from becoming psychologically depressed (The winter blahs). To combat heat loss I would devise insulated shutters for heat retention and security when not using the shop. Some windows need to be operable and located for cross ventilation. I don't want a man CAVE, but a space anyone would want to spend a lot of time in. A warm, welcoming, bright, clean, well organized space that has connections and relationships to other buildings and spaces and features on the site. I would like to look up from my work and see trees and birds and water and people in the yard. I would like to throw open doors and work halfway or completely outside on a nice day. I'd like to open windows and smell fresh cut grass or lilacs blooming. Would make the work a lot more pleasant.