He's awesome and he's ruler of Kahndaq. I know this won't really help but still, I think he trained Osiris to be his sidekick, so why not me? The Emperor is a wise teacher, even though he's insanely evil (kinda like a tall, evil Yoda). He's trained many Sith Lords and they've come out well at killing Jedi and conquering planets. He'd be my second choice as a mentor.
I think that the best supervillains are the ones that mirror their superhero rivals. It's been done many times and it's a trick that's still creative. Nearly all superheroes have evil copycats don't you think?
Spider-Man-Venom, Carnage Superman-Bizarro, Ultraman, General Zodd, Jax-Ur Batman-Owlman, Wrath Hal Jordan-Sinestro, Power Ring, Atrocitus, Agent Orange GLC (Green Lantern Corps)-Sinestro Corps Jay Garrick-Rival Barry Allen-Prof. Zoom, Johnny Quick Wally West-Zoom Kid Flash-Kid Zoom Iron Man-Titanium Man, Iron Mongor Capt. America-Master Man, Red Skull
Home to the World's Mightiest Mortal, Girl and Boy. Also these guys are probably the kindest and coolest superhero team ever. This is also the summer retreat of my favourite supervillain ever, Black Adam.
Kids in comic books are good. I mean what's so bad about little heroes and even little villains running around with their superhero (or villain) friends. I mean some of the world's greatest heroes started out as kids like Nightwing, Wally West, Kyle Rayner (I think) and even Luke Skywalker!