I don't mean the best game, just the most fun, for whatever reason.
For me #1 was probably the Cotton Bowl in 96. It was a great game, and I was there with family.
#2 is probably the Jazz game where my wife went into labor, because it makes a great memory.
#3 was a BYU game against Washington with my best friend from high school. We just had a lot of fun.
#4 was a Red Sox game against the Blue Jays in Toronto with a friend who was not a fan of either team (I was pulling for Boston), who is just hugely knowledgeable about baseball. It was a pitcher's duel, and the weather and everything was perfect.
#5 was in Boston, when the Jazz came to town, and a coworker surprised me with a ticket.
#6 was the the Ute game against Colorado this last fall with my son, who is attending the U., and also with my other son, who is a Ute grad, and it was just a lot of fun to be with family.
Those are my favorite memories. What are yours?