Was playing BF3 'til recently now playing a browser game, Forge of Empires. Its actually not exciting in the least but its something to do at work and very addictive, a building can take a real day to build so its one of those games you set and leave for a bit. Play it right and you can get quite far quite quickly, play it wrong and you will progress very slowly.
Recently purchased the first Supreme Commander as im bored of FPS atm but not installed yet.