YJ,
I'm an older guy... I remember the 80s (and mid-60s to mid-70s). Hasn't always been nice to be a Yankee fan (nor would it be so nice now if baseball had the sense that all the rest of the major pro leagues have and instituted a salary cap)..
I grew up an Orioles fan, living in MD between Baltimore and DC so I'm kinda the old-time opposite of a Yankee fan. What a Red Sox fan is today. Unfortunately, the Angelos carcinoma rendered me incapable of rooting for the Orioles any longer once Cal retired. So, I switched allegiances to the Nats some years back. Looks like that might end up paying dividends now.
Strange thing being an aging fan from the DC metro area. I am now a Nats fan, who haven't been good ever, and before that I was an Os' fan, and they haven't been good in ages. BUT, I have seen my favorite baseball team win a couple of World Series. I am and will always be a Redskins fan, and they have been horrid for the last decade. BUT, I have seen my team go to 5 Super Bowls and win three of them. Wizards...? Pathetic. BUT, I saw my Bullets go to consecutive NBA Finals and win one of them.
I live in the NE area now, and have to listen to them go on about the Pats/Celtics/Red Sox/Bruins. And they are doing great now. I'm just lucky enough that I remember, say... 1978-1983, when the DC area had two NBA finals, 2 World Series, 2 Super Bowls, and had a World Champion in each.
The funniest thing...? I reserve my most heated fanaticism for hockey, the NHL. I am a huge Washington Capitals' fan. Out of all the DC area teams (including the Orioles but excluding the Nats due to small sample size), the Capitals are the only one that has never hit an abyss. They were pretty bad in the early 90s for a bit, but due to some wise management decisions (dump the high priced over achievers and rebuild) and fortuitous drafts (Ovechkin), they have bounced back and now are the favorites to win the Cup this year by many respectable publications. But on the whole, after a putrid first 5 years, the Caps have been competitive ever since. Yet they are the only of my favorites to have never won a title, having only appeared in one Stanley Cup final series ('98) in their nearly 40 year history (swept by the Red Wings).