[Russ McGinley]

I would probably choose to follow the teams that have the best combined history + chances each year of winning the championship (The Ultimate Bandwagoner). Extra stuff like celebrities and special events would also be good. NFL is toughest because of parity.

MLB - Yankees (Cubs, Red Sox, Braves)
NBA - Lakers (Bulls, Heat, Magic)
NFL - Giants (Bears)
NCAAFB - Notre Dame (Florida)
NCAABB - Duke (Florida)