our lans usually consist of the following:
Red faction: Guerilla
and we usualy throw in a couple racing games or RTS game. C&C 3, or warcraft III, and some NFS shift or similar.
sorry for all the acronyms btw, ask if you arent sure what im on about.
i think thats a pretty good selection of games though. while we mostly focus on group based FPS, we find they are the best for lan games.