This will always be the coolest thing about having a 3d printer. Within an hour of my wife asking for a tool to help stamp down home made baby food into an ice cube tray for freezing, we had a custom ready to use tool.
I don't understand these people that have what look like several 3d prints a day. Where do these go? Are they all commissioned? Do you just have a room of prints? I feel like if it's not a practical print, I don't really have the space for it.