Little history first so you understand my favorite teams - I was born and raised in Miami, FL. Moved to West Michigan in Jr. High School.
1997 World Series. - Florida Marlins (I was 11 and remember a lot of it, even got to goto the victory parade and see the team one last time before they broke it up)
2001 NCAA Football - Miami Hurricanes. The best college football team in history. Should have been back to back undefeated seasons in 2002. I was so pissed off after that 2002 championship game against Ohio State. I never had a grudge against Ohio State but after that game I fricken hate them as much as Florida State, Virginia Tech, and Florida.
HORRIBLE CALL.
2003 World Series - Florida Marlins (again as one of the 10,000 Marlins fans in existence it was sweet to see them yet again win a World Series in their short existence, but of course the team was broken up and sold off once again, hence the 10,000 Marlins fans in existence.)
2006 NBA Finals - Miami Heat (Not only did the Heat come back from down 2 games to none to win it all against the Mavs, they beat the Pistons on their way to the finals. I've always hated the Pistons growing up and the fact that I lived in Michigan during that time made it even sweeter.)
2009 NCAA Basketball Championship - North Carolina Tar Heels (Although I've grown up a huge fan of Miami sports teams, the Tar Heels have always been my favorite college basketball team. My older brother was a huge fan growing up, and I of course liked the same teams he liked. But anyways, the main reason this one was so special was because the Final 4 and Championship was in Detroit that year and I was able to go to it with my brother who flew up from Miami to go with me. The finals that year was North Carolina vs. Michigan State and understandably that place was rockin with Spartan fans. But the Heels dominated the game and it was an awesome experience and fun to watch and be there in person.
Also, while I'm doing show and tell here, my favorite (and only) championship as a player was my Junior year of high school when we won the State Championship in Football. I'm #54 on the white team. We went 13-1 that year with our only loss being a 7-10 loss to the D5 runner's up at their place in the rain. We beat a team in the championship that was undefeated and crushing everyone in their path as we barely won our 5 playoff games by a combined 21 points. We won by 12, 1 (OT), 4, 2, and 2 points. We won 16-14. Being infront of all of those people and playing in the Silverdome in Detroit on television (FSN Detroit) was probably the most nervous I've ever been in my life.