We've primarily done DIY furniture; our apartment is very small and conventional furniture doesn't quite fit.

* a wooden bedframe
* a wood/carpet 7ft cat tree (seven years old, still used daily)
* a wooden chair (sucked) and a wooden stool (excellent)
* 8ft couch/sleeper (recently decommissioned)
* 3ft loveseat (formerly 4.5ft, chopped it down to fit a tighter space)
* corner wall mounted bookshelves
* cable cabinets for modem / router / webserver
* mood lighting to soften harsh white LEDs

My wife is the usual DIY instigator - she is even more of a cheapskate than me! She does the gardening work; like building garden beds, vertical gardens, etc.

For me the drive to do it comes from being a professional/practicing engineer. I am easily offended by mediocre products, and have the skills to do a perfect custom job myself, so why not?