Heroic: Roboto - loved watching his gears work and his mouth moved so he could "chat" like Trap-Jaw.
Evil: Stinkor - I thought he smelled awesome, which baffled everyone else. Little me considered him adorable. Best use of the Merman head (better than merman)-- I even kept the classic head on my MOTUC. The myp head looks a bit too angry for me.
Horde: Grizzlor - He looked like a mutant dustbunny or the thing that under the stairs. What is not to love?
Princess of Power: Double Trouble - I liked Man-E anyway, female Man-E like character was just gravy. She often played Man-E in female form for spy missions... but also played herself as a Rebellion spy