Well lets see, I occasionally play Homeworld, StarCraft, Brood War, and Command & Conquer: The First Decade, to remind me what a real video game is like. I also play Star Wars Empire at War, its expansion Forces of Corruption, Star Wars: Battlefront 2, The Battle for Middle-earth, The Battle for Middle-earth II, and The Rise of the Witch-king, primarily with mods, because they generally aren't worth playing otherwise.
I play some Halo 3: ODST, Call of Duty: Modern Warfare 2, and Battlefield 2, but not lately. Lately, I have been playing The Stronghold Collection, primarily Stronghold and Crusader. I will be playing Warhammer 40,000: Dawn of War and its expansions soon, since I got them during the Impulse sale.
I would be playing Sins of a Solar Empire, Entrenchment, and Diplomacy right now, but they just doesn't want to work with the newer graphics card.
I am watching the development of Sins of a Solar Empire: Rebellion, Stronghold 3, Star Wars: The Old Republic, Halo: Combat Evolved Anniversary, Halo 4, Ghost Recon: Future Soldier, Call of Duty: Modern Warfare 3, and Battlefield 3 very closely, even though I need a PS3, an Xbox360, and a new computer of my own in order to ever play any of them when they come out. Warhammer 40,000: Space Marine, Killzone 2, and Killzone 3 look promising, but they are in the "I need something to even play it" category.
I am also keeping an eye on a few mods, Phoenix Rising (I am a better tester for it!) and Ultimate Empire at War for FoC, BfME II Special Extended Edition, Dawn of Victory, and several other Sins mods.