Champions Online takes the rich character creation that Cryptic created for NCsoft's City of Heroes and brings it to the next level. Not only can you spend hours designing the perfect superhero costume, the ability to pick and choose your powers rather than relying on set archetypes means that no two character need be exactly the same.
It also means that it is a bit harder to manage group roles in the game. With players able to select their own powers from a pool, players will have different ideas as to what constitutes the tradition roles of tank, damage, crowd-control, and support. At least it won't be dull, right?