My personal favorite was Boilermaker, what with all the great teams like techno-kats and 1501 being upset in the first round and many matches coming down to whether or not a robot will be lifted or get up a ramp. The final match (with it tied 1-1) came down to whether or not (sorry if i missed the team #'s) 1023 could get up 461's ramp, while no ringers were scored and 1555 lifted 234 and 1730 up for 2 15 point bonuses.
Though I know for a fact that I have a biased opinion
