It's about time that I talk about this MMORPG that I'm spending a lot of my time on. this free game is called League of Legends, and it is absolutly fantastic! It's still being made, but it is still great fun.
You pick a 'Champion' (there's 40 to choose from so far), and with your team (normally 5 people), you enter this arena and have to battle to destroy the other team's Nexus (base) while protecting your own. I'm bad at explaining things and it's easier if you look on their website.
http://www.leagueoflegends.com/Anyway, I have two favourite Champions: Soraka and Morgana. Soraka is the average Healer, and I build her as a tank, which works quite well. Morgana is a Mage, but I think of her more as a sniper, since you have to actually aim where her spells are going to go, and it's hard to get used to at first.
EDIT: I also have two more champions I play a lot of: Zilean and Teemo. Teemo is an absolutely adoreable Yordle who is my DPS character. Zilean is my other support character, although he does have a nuke spell. I build him similar to Soraka, but I give him more AP (Ability Power - increases his spell power).
I originally played the game with friends from school (aka The Elite Summoner, Davlin), but I've made a couple of friends on there too (naimly Dracoon, MistPanther, Vikings), and it's fun when we make our team of five, or play small little games against each other.
I also got asked to join a pre-made group, which I thought was really [I had the word a moment ago, but I forgot... O_o]. I didn't think I was that good, and being asked to join was quite an honour for me, but it's late, and I had to say no. Be sure to look at the website if you're interested. ^_^