I'll keep my bias for Chicago teams out of this, but I do think the Cubs deserve some mention for loyalty. Best baseball fans: First thought is Cardinal or Red Sox fans, but I think each franchise needs a good ten or fifteen year drought from the playoffs to know how good they really are. I'm picking the Milwaukee Brewer fans. Small market team and they always draw well even when the team is mediocre. Minnesota Twins fans also very loyal. Worst baseball fans: Tampa and Miami in a dead heat with Atlanta Braves fans deserving an honorable mention. Best football fans: Most cities sell out each game, but I pick the Kansas City Chiefs for staying rabid even with bad teams. Green Bay Packers and Denver Broncos and Philadelphia Eagles also near the top. Worst football fans: Jacksonville Jaguars and Carolina Panthers. Two cities that do not deserve teams. Move one team to Los Angeles and the other to London or Toronto (hopefully that won't hurt the CFL) and be done with it. Best basketball fans: Utah Jazz. They got nothing else going on in Salt Lake City, but the fans are totally into that team, good or bad (and don't Mormonism and jazz music go together so well?). Worst basketball fans: New Orleans Hornets or Pelicans or whatever. City only cares about football. Move team to Seattle. Best hockey fans: Detroit an obvious choice, but they are always good, so it has to be a Canadian city. I say Toronto Maple Leafs. Almost never a good team and probably has more true fans than any other team in NHL along with Canadians. All other Canadian cities and Pittsburgh for honorable mention. Worst hockey fans: Phoenix Coyotes. Why the hell is there a hockey team in Phoenix, anyway?