Are there no builders that also thoroughly play in their creations?

Every house needs at least one computer (unless you're playing a no-tech situation, but computers are often very important for daily tasks). That means a Desk, a Desk Chair, and a Computer, with pathing that allows your Sim to get to it and sit down.

It's nice to see desks cluttered up but you have to watch out for it getting in the way. Sometimes my Sims have put down books on top of their computers. These have then made it impossible to sit and work at the computers.