I went to grad school at Kansas and became a Jayhawks fan, and experienced a huge rush when they won NCAA basketball titles in the 80s and a few years ago--plus many disappointments when they failed in teh tournament. But they are always a contender.
While out there I became a big fan of the KC Royals. I suffered when they lost three consecutive years in the 1970s to the Yankees in the playoffs, then lost the World Series in 1980 to the Phillies (I went to one of the games) but finally had the pleasure of seeing them come back from being doen three games to one (the first team ever to do this after having lost the first two games at home) to beat the Card in the 1985 World Series.
Finally, I teach at NC State and followed Jim Valvano's basketball team through the magical 1983 NCAA tournament run ending with them upsetting Houston to win the title on the last second dunk by Lorenzo Charles.
None of these could compare, however, to what I'd feel if the Bills were finally to win a Super Bowl. I'm not holding my breath.