Pvp game
I used to have shittiest known PC to men so I had nothing to play but mediocre indie games that didn't require much processing power. That's why I couldn't get into newer gen games even when recently I got a proper setup. So from my experience, Elder Scrolls (Oblivion-Skyrim), Valve games (Counter-strike, Portal, Half-Life, Team Fortress 2) and GTA games are the ones I always come back to re-play.
I felt I was late for Maplestory so I gave the Maplestory 2 a try, it was really interesting but I didn't get to play much untill they closed the servers, such a shame... I wonder what happened with it.
Ew...you play mw2? gross game btw, they treat it so shit and I'm the guy who bought it and grinded all of season 1 and camos and everything it has to offer