Source: cheatsheet.com
6. Parasite
I love the Parasite. He's one of the few characters for whom I can't pick a favorite version.
I love the weird prune-faced version. I love the huge, bloated, All-Star Superman version. I love the hulk-like leech-mouth version with all the teeth. I love them all, each and every one.
Rudy Jones was a STAR Labs janitor and, – stop right there. I get it now; I think we all do. Janitor for an experimental lab was about as "I'm gonna get mutated into a hideous monster" as you can get in terms of jobs. But Rudy found himself mutated into an energy-eating monster called The Parasite.
He went after Superman a bunch, because when you need to feed off of energy, that's pretty close to the best option. The actual best option, of course, would be to train yourself to be fearless so you can get a Green Lantern ring and then suck on that thing like a Ring Pop until you're full. But, y'know, fight Superman instead. I'm sure that'll work out great for you.
