Mine was named Rykaan: a powerful, fire-wielding homunculus created by an evil wizard for the sole purpose of destroying the world. Rykaan started out mindlessly and mercilessly slaughtering everything in sight (as he was created to do), until some other character showed him kindness for the first time in his life (which naturally caused the strange sensation of regret) and set him off in a spiral of angst and redemption. He'd end up turning against his creator in an epic war for the fate of the world.

Every single RP of mine for the first couple years had this exact same plotline. I'm still not tired of it --  it's so tacky and tropey it's awesome.