It's a fun moba-styled MMO. The creators of Defense of the Ancients (DotA,) the Warcraft 3 mod created LoL and it's really fun. They're releasing a new game mode soon called Dominion, and it's hella fun. I'm surprised no one has created a thread about it yet.
It's free to play, which is awesome. My user name is LastProtagonist. Feel free to add me if you want to play sometime.
For those who don't have LoL, here's a signup page:
The game is like 1.2gb, but with added patches it comes in at like 2.15 gigs.
For those who do play, who are your favorite champs and why? How do you feel about Dominion?