I have more fun with Arduino type boards than RPis. For me, RPis are just fun to see where you can put a little computer, but I like all of the soldering, bread boarding, wiring, etc of the various shields in the Arduino realm. I get the best of both worlds with the analog/digital inputs, plus the programming in a very limited (requires some creativity) fooprint type of challenge. I haven't messed with the GPIOs on a RPi though, but now we're back to just programming in whatever unsconstrained/unrestricted way of a desktop. ??? we all like different things.