Three colors: silver, black, and bruised. 
Well, I root for the NY Jets, and they’re currently in a different state.
Different city is all my teams, too, since I don’t live in New York City. I do feel a bit lonely here in upstate NY as both a Mets and Jets fan, though. The Yankees and Giants are the big teams.
I live in Brisbane and have remained devoted, through many lean seasons, to the South Sydney Rabbitohs. Our local team, the Broncos, are pure puppy-crippling, baby slaughtering, Rupert Murdoch fellating evil.
I also cheer, half heartedly, for New South Wales in State of Origin games because, seeing as Broncos players make up a signficant proportion of my native Queensland team, I feel that the New South Wales player’s desire to beat their brains in is a laudable goal.
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I grew up in St. Louis, but in football I root for the 49ers. (I hate the Rams)
I have taken the Dodgers and Angels to heart, but I could never shake my allegience to the Cincinati Reds and Bengals.
I feel your pain lately.
I am a die-hard Broncos fan, but I’ve always had a soft spot in my heart for the Minnesota Vikings. It goes back to my brief stint as a sports reporter for a small TV station (which no longer exists). (My Broncos were less than 10 years old and weren’t even a factor yet in the AFL.) Joe Kapp had dazzled us in 1968, hurdling blockers and tacklers and rushing for 3 TDs. In spite of that, the Vikes had been only 8 and 6. They got to the playoffs, but they were just a slightly-better-than-average NFL team. So when it came time to pick the champions at the beginning of the '69 season, I remembered Kapp and a few spectacular plays, and I knew Bud Grant had worked hard over the off-season on tightening up the defense, but there weren’t any big player acquisitions or overhauls. So, on the air, I picked the Vikes to take the NFL Championship. The sports anchor (who picked the L.A. Rams) and the other reporter practically laughed me off the set and practically demanded that I come up with other reasons for picking the Vikings. All I could come up with was any team that wears purple can’t be all bad.
That season the Vikes went 12-2 in regular season play, eliminated the Rams in the divisional playoff game, murdered Cleveland for the league championship, then suffered the first of what would be four Super Bowl losses. I’ve loved the Vikes ever since. My dream Super Bowl is the Broncos and Vikings (Broncos are down 20-27 in the fourth, drive 80 yards in the last 3 minutes for a TD, then win with a fake PAT kick that sends Elam around the left end for 2 – and the crowd goes wild!!!)
But yeah, the Vikings. Other than that, Denver teams all the way. Love my Nuggies, Chokies … er, I mean Rockies … and the Avs.
I followed a certain college team for many years but this year and on forward I’ll not give them two-minutes of my time. What losers!
I was born and raised in NJ so I grew up all about the Mets, Giants, Devils and Nets. Not the winningest group in the world but always entertaining and I could afford their tickets from birth till now so that was a definite plus. Once I got to college I got wrapped up in the fanaticism out here in Pittsburgh. It really is impossible to live out here and not cheer for the home team. As long as they are not playing one of my beloved NY/NJ teams, I am all about the Black and Gold.
I was born in Texas, hence I am a Dallas Cowboys fan.
I grew up in California, so all of my other sports teams are from California … except baseball because, as far as I’m concerned, baseball does not exist.
Even though I was born and raised in New York City, I rarely rooted for New York teams when I was a kid. My favorite teams came from all over:
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In baseball, my favorite team was the Minnesota Twins- mainly because the first baseball player who ever gave me his autograph was Earl Battey, the Twins catcher. Tony Oliva and Harmon Killebrew were my favorite players, and I didn’t really become a Yankees fan until around 1973, as Tony and Harmon were beginning to decline.
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In football, I was an Oakland Raiders fan. You must remember, in the late Sixties when I first started following football, blackout rules were very strict. If a game wasn’t sold out days before kickoff, it wasn’t televised locally. The Jets almost never sold out, so they were rarely on TV in New York. Raiders games were broadcast in NEw York all the time, and I LOVED the wide open, deep passing game of Daryle Lamonica and Warren Wells. I eventually came to embrace the Giants as my second favorite team, and finally lost interest in the Raiders when they moved to L.A.
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In hockey, I was a Montreal Canadiens fan- mainly because I was a tall, awkward, bespectacled nerd, and Ken Dryden was the one hockey player I could relate to! And the idea that a guy could win a Stanley Cup, leave the NHL to get a law degree, and then come back to win a few more Stanley Cups was just way too cool for words.
Since the OP asked about other cities, I should add that my #2 NFL team is the San Diego Chargers since I grew up in SoCal.
Although I don’t really follow any sports besides NFL football, my NBA team is the Sacramento Kings and my NHL teams are Anaheim Ducks and San Jose Sharks.
This year is looking up. I will be disappointed if we don’t make the playoffs this year. Unlike the last few years where I held no such illusions.
Growing up in Albuquerque, I had to go outside the state. My local choices were the Broncos, the Cardinals (you’d have to be kidding), and the Cowboys (ugh! and dislike of the Cowboys from my parents helped), so Broncos it is. I like to see the Steelers and the Eagles do well as well, but when it comes down to it it’s the Broncos all the way.
I loved going to Dukes games when I was a kid, so then I was rooting for the Dodgers. Don’t really root for any team when watching MLB these days–right now I’m watching the Indians-Tigers game and am mostly rooting for the Tigers to come back from an early 4-0 deficit and make a game of it. Never liked the NBA or the NHL, though I enjoyed watching the Penguins from time to time when I was in Pennsylvania.
I’m 100% Giants, Niners, and Sharks (I don’t like basketball); I was also born & raised here.
Mt roommate, on the other hand, was born & raised outside of San Diego, wen to college in Riverside, lives here now, and is an Atlanta Braves & 49er fan (he’s lived in SF about a year). Go figure.
Although I was born in California and grew up in Texas–my team favorites are exactly the same as yours: Dallas first, then San Diego (as I’ve said before, Mom was a cheerleader for them their first year–I gotta love 'em!).
Even though I’m in Alabama now, I still see lots of Dallas fanwear. (Possibly because I’m only an hour’s drive away from Emmitt Smith’s hometown of Pensacola! )
I’m from Cleveland so I rooted for all the local teams, but when I was a kid in the 1970s I also rooted for the Minnesota Vikings, because I loved Fran Tarkenton, and the Golden State Warriors because Rick Barry was my favorite player. I guess I had a thing for obnoxious white guys. 
I was born in Milwaukee, so I am a Packers fan. I’m a Cubs fan for the same reason as Happy Lendervedder. I am a Carolina Hurricanes fan since they are my home town team, before that I like the Oilers. I haven’t been following basketball since Jordan retired.
New York City’s # 1 Royals fan, checking in!
Back in 1982, I started rooting for the Royals because I had them in my class baseball pool (whoever’s team had the most runs for the week would win). That year, the Yankees and Mets both sucked, so I kept the Royals instead of dropping them after the pool ended. Now I’m just too invested to quit, despite the Royals’ best efforts to make me.
If I have to watch the American League, I root for the Red Sox (the wife’s hometown team) or the Mariners (the only West Coast AL team worth mentioning). Neither is local, and I’d rather watch soccer than root for the Angels.