Heh. My "pick something" strategy almost always turns on the "What have I got sitting around that's close enough for what I need?" Sure, and STM32 or an Atmel AT8 _might_ be a better choice, but if I've got a drawer full of Arduinos and a bunch of projects with RaspberryPis in them that haven't been powered up for months - I'll go rat those bits and use them... (Last weekend, I wanted a 6dof IMU sensor - which I could have ordered - but I just used a spare quadcopter control board with a dud baro sensor, because it was there when I wanted it... I ended up using the mags in the 9dof sensors on the flight controller as well, so win all round...)