Finally finished watching .hack//sign today. Yeah, I know its a pretty old show, but I haven't got the time to watch it before.
 
For those of you that doesn't know, this series came out way back in 2002. The main plot revolves around the character, Tsubasa, who is trapped inside an online game called "The World" and is unable to logout. The anime also explores some pretty deep issues. For those that haven't done so, this is definitely a must watch.