Guess I'll need to add my top collection stuff for starters. I'm mostly team and set collector. More of a Vintage guy (pre-1980) than modern.
Baseball: Washington Nationals
Football: Washington Commanders
Hockey: Washington Capitals
Defunct Teams:
Baseball: Washington Senators
Football: Washington Redskins
Players:
Baseball: Frank Howard, Ryan Zimmerman
Football: Sonny Jurgensen, Roman Gabriel
Sets:
Baseball: 1965, 1974. 1975
Football: 1974, 1975, 1976
Hockey: 1974-75