Been playing lots of Warcraft 3. What a fun game! Released in 2002 to rave reviews, the game holds up great to today's standards, thanks to Blizzard's top notch sound, gameplay, and graphics. There's like 50,000 people playing it worldwide at anytime, too.
I kind of dislike the Town Portal mechanic of the game though, where armies are teleporting around the map to defend bases. I wish there was at least an optional game mode where Town Portal scrolls were disabled or somethin'. It just doesn't feel right to have armies warping into battle like that. This ain't Star Wars, dangit! :-P