Living together with designs is great. You can build, test, build, test until you drop. Customizing bikes gives me a sense of ownership, which I think is missing in a lot of 'products' in todays society. I love to provoke with bright shiny bikes in contrast to the boring, generic subsciption model bikes you see a lot now a days.
As a guitarist, it is great to work on my own instruments. Since guitars have not really improved in the last 50 years, I love to pick up old guitars and restore them. I love continuing the musical journey that once were connected to these instruments by previous owners.
I love tube amps and the way they were built. You can tell they were hand made with a lot of care. That makes them very repairable as well. They are much more approachable to repair and keep working than modern electronics with complicated citcuit boards. These electronics were built to last, which is something I especially value.