Man im really more in it to study stuff.
MUGEN, GZDOOM, and RPG Maker are like the trifecta of doing easy things to understand the concept and mechanics of what makes a game a game. You use MUGEN to learn how fighter development works and how fighting games balance stuff, you use GZDOOM/Slade to understand FPS level design and ect. And RPG maker is for RPGS.
In terms of a favourite character, i say omega tigerwoods. he's a classic goof character.