I think we did this a long time ago but worth revisiting
For me
AFL: Essendon
Union: All Blacks and Crusaders
League: Kiwis and Storm
Cricket: Black Caps, Western Warriors and Scorchers
NFL: Eagles
Basketball: Sixers and Wildcats
NHL:
MLB: Phillies
Football: All Whites, Sheffield United and Victory
Motorsport: Daniel Ricciardo
Am sure I’ve missed something obvious but this is also proof I spend too much time watching sport.
AFL: Essendon
Union: Wallabies
League: Australia and Storm
Cricket: Australia, Victoria, Renegades
NFL:
Basketball: Ben Simmons, Melbourne Tigers
NHL:
MLB:
Football: Socceroos, Wolverhampton Wanderers
Motorsport: Daniel Ricciardo
Tennis: Roger Federer
Golf: Aussie players
Nrl: Balmain
Basketball: South East Melbourne Spectres
Soccer: Melbourne Knights
Don’t follow any other sports…
Mine’s just Essendon (AFL, obvi) and the Pittsburgh Penguins (NHL).
AFL - Essendon
NFL - NY Jets
NHL - NY Rangers
College Football - Florida State
English Football - Millwall
Got me covered too.
Although about a decade ago, I was a long suffering Leeds United supporter. It would take them to rise back into the premier league for me to take more than a passing interest. So…maybe another decade away.
Australian Sports
Australian rules: Essendon
A-League: Melbourne Victory
Big bash: Melbourne Renegades
NBL: Melbourne United
NRL: Melbourne Storm
American Sports
NBA: Boston Celtics
NFL: New England Patriots
MLB: Boston Red Sox
NHL: Boston Bruins
International Sports
EPL Football: Liverpool
Formula 1: Daniel Ricciardo
Tennis: Nadal
Golf: Jason Day
Australian Sports
SANFL: Norwood - season tickets
AFL: Essendon - season tickets
NRL: Parramatta - season tickets
Super Rugby: Brumbies - season tickets
Cricket: Redbacks, don’t follow T20
Soccer: Adelaide City, Adelaide United - members of both.
NBL: Sixers
All National sides
US Sports
NBA: NY Knicks
MLB: NY Yankees
NHL: Washington Capitals
NFL: Washington Redskins
International
EPL: Manchester United - member
Serie A: Juventus - member
SPL: Aberdeen - member
Casual supporter of Kaiserslautern in Germany and Valencia in Spain.
Tennis: Nadal
F1: Dan Ric
My life pretty much revolves around sport and most of our social life is determined by sporting events
Australian Sports
AFL: Essendon
VFL: Essendon
A-League: Melbourne Victory
American Sports
NBA: New York Knicks
MLB: Yankees
MLS: New York Red Bulls
International Sports
EPL: Arsenal
International Soccer Team: France
In order of importance:
Arsenal
Essendon (sorry 
)
Knicks
Essendon
Liverpool
Boston Celtics
Dallas Cowboys
New York Rangers
Essendon
Ricciardo
Miami heat
Manchester United
Federer
Richard Gasquet
Stan the man
(Anyone else with a 1handed backhand)
Passionately follow
Dons
Totty Hotspur
Denver Broncos
Aussies on both the PGA and European golfing tours plus Tiger Woods and Freddie Couples.
Australian Test cricket team
Socceroos
Casually follow
Boston Celtics
Boston Red Sox
Melbourne Victory
Melbourne Renegades
Glenelg
AFL : Essendon Bombers
that’s it.
My one sporting passion is Essendon
other teams I follow
NHL: Edmonton Oilers
MLB: Toronto Blue Jays
UK Soccer: Everton
Footy: Essendon
Warburton-Millgrove (Yarra Valley)
Association Football: Aston Villa
Melbourne Victory (A League)
Ice Hockey: New York Islanders
Peterborough Petes (OHL)
Basketball: Detroit Pistons
Baseball: Chicago Cubs
American Football: Chicago Bears
Rugby League: Balmain
Umpires: Chelsea Roffey
Tennis: Andrei Chesnokov and that mushroom haircut
Honourable mentions: Union Saint-Gilloise, Brentford (not so much the past two seasons), Rochdale AFC, Saint Etienne, AS Roma, Borussia Dortmund and the Victoria cricket team.
AFL: Essendon
AFL before essendon? you monster.
Essendon member
NBL: Melbourne United member
NBA: Lakers
That’s all I have time for.
AFL: Essendon
Union: Melbourne Rebels
League: Melbourne Storm
Cricket: Aussies, Bushrangers, Renegades
NFL: Oakland Raiders
MLB: LA Dodgers
Football: Arsenal
Netball: Vixens
AFL: Essendon
HFNL: Port Fairy
EDFL: Aberfeldie
VAFA: Glen Eira
EPL: Spurs
SPL: The Hoops
MLB: Braves, Cubs to a lesser degree
NRL: Storm, Rabbitohs
Cricket: Australia, Vics
Can’t cop
NFL is more who I can’t stand which is NFC East and the Patriots
EPL can’t stand Man U, Man City, Liverpool, Arsenal, Chelsea, Newcastle
NRL Manly
MLB Rest of the NL East, Yankees, Cardinals, Tigers, Giants (won too often and have a sense of entitlement)
Cricket: everyone else
SPL Rangers