1960 - Pittsburgh Pirates
1964 - St. Louis Cardinals
1957 - Milwaukee Braves
The above teams of course all beat the New York Yankees in the World Series. Being a Yankee hater defined my interest in baseball as a kid. As a result I never developed a single favourite baseball team above all others.
Right now the list of my favourite baseball teams stands as follows:
1) Pittsburgh Pirates
2) Detroit Tigers
3) St. Louis Cardinals
4) Toronto Blue Jays (My antipathy to having a team made up of largely Americans and Latinos claiming to represent Canada faded after I started cheering for knuckleballer R.A. Dickey.)
5) Baltimore Orioles
6) San Francisco Giants
7) Philadelphia Phillies
The Cleveland Indians were my favourite team but they're now gone as are the Oakland Athletics who were right up there in my top three. And of course the Milwaukee Braves disappeared decades ago.