At our LAN's, both new and old games get their time of glory, to mention a few:
Age of Empires 2
Company of Heroes
Call of Duty 4
Jedi Academy
Warcraft III (DotA only though)
Other old & new games that have a little less popularity, and a few past favourites (Which will be reinstated if possible if people are interested):
Call of Duty 1 & 2
Jedi Outcast
Counter-strike, DoD, Half-Life and their Source counterparts, Left 4 Dead and a countless number of Source Mods
Red Alert 2
Command & Conquer 3
Medieval, Rome and Medieval II: Total War
Battlefield 1942 and Battlefield 2
Unreal Tournament 1 and 2004
StarCraft (While wildly popular with some of us, many don't give it two looks, and personally is not a big favourite of mine since I get owned so easily by the veterans, who are the only ones who want to play it XD)
We'll have to try to scoff through most during the December LAN...