I am a heavy user of Raspberry Pis. Every year I build a massive musical lighting setup for Christmas using couple of Pis. During Halloween, I build Pi-powered talking skeletons, spooky pumpkins, and scary lights. Raspberry Pi powers the wireless controller for my open source 3D printer and my water foundation in the garden. I am using Pi to run a Retro gaming rig, and my next project includes a remote controlled car and a possible drone.
You get the point, I am a heavy user of Raspberry Pi and IoT.