Re: Post your most abusive munchkin character here
Mole Man-
Mole Man's major power is duplication with a 295 point adder letting him become 1 mol copies of himself (be sure to add in all sorts of Side Effects to make it cheaper and to show that he's now really small). He also has a 1d6 EB with a +4 Variable Advantage, Life Support Does Not Eat/Sleep, and a bit of Flight.
Now Mole Man is usually split up so that there's at least one on every hex on the planet or into 1000 man hit squads. When in combat (assuming he's going with the hit squads) have 500 mole men hold their actions. The other 500 modify their EB with +2 worth of advantages. For example 100 get NND, No Range, AoE One Hex, another 100 Quad Penetrating, etc. The end result is 500 1d6 EB with all sorts of advantages! Even if the target can effectively resists much of the EB, chances are one group's will get though their defenses doing around 50d6 or 100d6 damage!
I don't go with Shrinking because Mole Man will be short for points. Also he doesn't really need the advantages it offers. Just go with the disadvantages and let your DCV and Body be low. You can only hit one mole man at a time anyways. For AEs, that's why you have mole man split up whenever possible. I know you can make him as a 500 point character, but how cheap I don't know.
As for background, Mole Man was once a janitor at a weapons research facility. After a malfunction of the Cheese Grater of Death prototype, Mole Man was hit by it dividing him into a mole of himself! The accident also gave him control over molecules. Now he went rogue and now works as an assassin for hire.
Aggro Man-
Aggro Man in my opinion is just as broken as Mole Man, but in a different way. First have Aggro Man disadvantage's such that nearly everyone has a reason to hate him (such as Rep- Nazi, Racist, Puppy Drowner, Hippy, whatever). As for his powers, get him a ton of defensive powers such that he's extremely hard to take down (hardened defenses, absorption into Stun, whatever). His offensive power is a Mind Control with the Set Effect (Attack me). It doesn't have to be that big of a mind control either, just enough to beat most people's Ego scores regularly (maybe 5d6 or so).
Aggro Man's tactic is simple. When combat begins, make a presence attack to anger the other side. Then, hit the enemy with the Mind Control. As they're inclined to attack him due to the presence attack, reputation, and being in combat, Aggro Man only needs to exceed their Ego Values! When the enemy begins to attack Aggro Man, it leaves the rest of the team freedom to attack the enemy at their leisure. Aggro Man takes the punishment while his teammates can haymaker, put all their CSL into OCV and damage, or take extra time.
Aggro Man's background is that as a child, he was ignored by his rich and busy parents. Desperate for their attention, he began to do all sorts of bad things. However no matter what he did, his parents won't care or notice. Finally when Aggro Man's powers manifested, it was influenced by his desire for attention, giving him the powers he has now so that he can always be the center of attention in combat, at least.