I can't help it, I love the Raspberry Pi!
I don't have any of the newer, multi-core ones, but I do have an old model B that I just installed the latest Rasperian and Pixel on it- for an UNBELIEVABLY full-featured tiny computer. Includes several programming languages, LibreOffice, some games, a good web browser, and a really decent window manager/OS look & feel. And this is supposed to be their "lightweight" version- it's freakin awesome!!!
Anyways, I do have a Pi Zero- that is actually slightly more powerful than my Pi B- I think the B is like 700 MHz single core, and the zero is 1 GHz single core. Anyways, the Pi Zero not only runs RetroPie/Emulation Station (https://retropie.org.uk) without hickups for most older game systems (read pre-Playstation/N64 generation), but the whole system fits neatly in an NES cart!
Checkout my video on youtube where I make one: https://www.youtube.com/watch?v=MlTlArAT0vk
What are you guys using your Pi's for?