I'm more or less surrounded by things (garden tools, drills, electronics, pc's etc) that most would have thrown away, great pleasure in the prosess of finding the defects \ problems, working out \ trying out fixes, modifying, making up or buying spare parts.
Then each time something is back in practical use, getting my wages in the form of a good dose of satisfaction, seeing my skills are worthy of something, and saved some environment + money on top.
For the really unsalvageable stuff, dismantling completely and keeping anything that may be useful in a week's or 10 year's time, like special screws, switches, washers, bearings, electronic prints for resistors \ capacitors, etc.
btw, my cars over the many years, having a basic philosophy that as long as rust don't eat them up, fixing is worth the 'more or less entertaining' jobs needed and the new parts. When avoiding having to pay garage mechanics, a lot of repairs turns out really inexpensive in the end.