I only ever really played the original, 2k3, and then 2k4 for a little bit before moving over to the original Call of Duty. I also only played instagib CTF. It was great for a while. Playing in the ladder matches with a clan. Though, everyone moved on to CoD, and I followed.
Never really held an interest for UT3... felt ripped off when they didn't live up to their promise to push out an Unreal Tournament every year as the new Sports game.