I have a home office that I love. I spend a fair bit of time in it, but not 90%.

Ikea Standing Desk (Skarsta, crank, 63"). Dual 34" monitors, a desktop I love, Kinesis Freestyle 2 keyboard, and a Kensington Expert Mouse. Pen holders, notebooks, filing cabinet like thing, and a standing mat. I also have a glass whiteboard (essential) against the wall, art in front of me that I appreciate.

I have bookcases full of books, technical, religious, and science fiction - different things to chill out with should I need it. I keep a guitar handy, on a stand, ready to go, with a stereo system, decent speakers, and a great turntable.

I have a papasan chair, and a roadbike on blocks, so that I can force myself to change my space, to explore an idea, or calm down.