I am almost finished with a retro-fitting project on an old sewing table that I couldn't find a machine machine for. It is very sturdy with plenty of drawer space, and the kind of work station geography that invites customization. Into this work station, I have dropped a 1927 Singer 99 (manufactured April 23rd, 1927 - in a few days, I will have a 99 that is 99 years old) which has been equipped with a hand crank. I don't have many photos of it yet (because it isn't finished) but I can share a couple pictures of some of my favorite details.
Anyway, what kind of DIY long-term renovations have you made to a space or a workstation for no reason other than your own sheer enjoyment of it?