For instance, I think it was last LAN, or the one before that.. we had all talked about trying to make it an "old skool" LAN; play the older games. So I packed some of my older games with me; Q3A, BF1942, etc... and we never played any of them... almost glad because as shado said, I had quite possibly the most fun playing UT2004 than I ever had before.
So 3/4ths of me feels that playing on a random schedule is the way to go. You never really know how much fun you'll have.