LEFT: Some of my earliest OCs, from a story where Sonic Swish was that dreaded Alicorn OC. Gears and Tinker are twins (Gears: Dusty Blue coat with Grey mane; Tinker: Grey coat and Dusty Blue mane), and Sparko (White coat and (possibly) Yellow mane), their younger brother. They specialize in different aspects of technology (Try and guess, based off the names), and run an electronics/machinery store/repair place.
RIGHT: Random doodle of an astronaut on the moon, with stars, the Sun, and Earth in the background. This started off as something else, and just kinda wound its way to being an astronaut...