Before switching back to Villain, I looked through all my badges and pulled out the ones where the names and/or descriptions are different for Hero than they are for Villain. I'll be doing the same the other way around before long, but not for another couple of hours at least.
This is data that needs to be put in the wiki, but I can't be bothered at the moment. (-:
Agent of Order
Without heroes like you the world would fall into chaos and despair.
Anger Manager
With time, your legendary rage towards inanimate objects will be a thing of the past.
Annihilator
After the beating you handed them, the Freedom Phalanx is very glad that you're on their side now.
Blockade Runner
Your skills at circumventing trade restrictions and finding profit are handy in Paragon City. Recently it seems many have managed to run the blockade from the Rogue Isles, turning those restrictions into a paper tiger.
Bloody Hands
The memory of the heroes you defeated haunts you throughout Paragon.
Born in Battle
You may have proven yourself as Born in Battle, but in Paragon City other virtues matter more.
Ex-Archvillain
Statesman is known for seeing the good in everyone, but in your case it took a little longer than average.
Ex-Marshal
You once held the title of Marshal in Arcahnos. Unfortunately, the memory is all that remains of the power it once gave you.
Exorcised
The goodness you've let into your heart appears to have banished the spirit of a demon which once resided within.
Eye of the Storm
Maelstrom crossed the line and had to be stopped. Thankfully you were there to prevent things from getting out of hand.
Eye on Arachnos
Same as Arachnos Spymaster
Former Servant of Recluse
You have broken Paragon City's 'best,' and now must atone for those actions.
Gate Closer
You'd hate to have to defend Portal Corps from the Arachnos Flyer should it ever return to Peregrine Island.
Global Guardian
As a villain you struck at Atlas Park, the very heart of Paragon City, proving you must always be vigilant in its defense.
Gotten Soft
You once had an incredibly High Pain Threshold, but it seems you've grown a little soft after coming to Paragon City.
Grass is Meaner
You have traveled from the relative safety of Paragon City to the rough and tumble Rogue Isles, where it seems even the grass is meaner.
Gunrunner
You've scored the biggest coup of all; smuggling directly into Paragon City. Unfortunately, it's a long round-trip.
In Therapy
in order to get along with the heroes of Paragon City, you've started to see a professional about your desires for world domination.
Johnny's Ex-Best Friend
Same as Johnny's Right-Hand Man
Judge and Jury
You defeated one of the signature "Rogues Gallery" characters in an Alignment or Morality mission earning yourself this badge.
Libertarian
Same as Anarchist
Locksmith
With your knowledge of safecracking, you've given the local locksmiths a few pointers.
Made a Stand
Your morality has been demonstrated to all, at least for today. You completed a Morality Mission to earn this badge.
Pedestrian
No one sane lets you get anywhere close to their vehicles now.
Penitent of Vice
Paragon City still remembers the black eye you gave it to impress Arachnos, and won't soon forget.
Pirate Hunter
Same as Air Pirate
Reformed Firebug
For your actions setting Paragon City ablaze, you've been prohibited from owning matches or lighters of any sort.
Return Visitor
You've seen a lot of Paragon from the other side already, so you've got a head start on making your new life here.
Revoluationary
The Family doesn't make as many deals on the beach in Independence Port since you started working in Paragon.
Shark Bait
Captain Mako once called you an ally. Now he calls you a snack.
Steel Worker
Not even the hardened metal made in these factories of Steel Canyon was able to protect this city from determined villains. Good thing Paragon has you now to do it.
Talon of Talos
You know all the possible places where criminals lurk to ambush people in Talos - knowledge that only someone from the other side could have.
Tested the Water
You're not quick to pass judgment on others, but will step in when things stray off course. You earned this badge by helping someone complete an Alignment Mission that is not the same as your current alignment.
Thin Line
The Paragon Police Department has an entire squad tracking you. They've let you know that you walk a Thin Line here in Paragon.
Uninsurable
The massive destruction you previously wrought has made it really difficult to find anyone willing to insure you for collateral damage liability.
Whip Cracker
You defeated Desdemona and her demons, however you saw a glimmer of good within her heart. Perhaps there's hope for her yet.
Yesterday's News
While rampaging in the Rogue Isles, you acquired an Immobilizer Ray. Unfortunately, it seems to require something only present there to recharge.