People don't hate this, but there is something I found under appreciated.

In the beginning of the game when Tidus comes out of his boathouse to sign autographs you can talk to some girls and they say they'll be sitting "east block in the front row, fifth from the right".

Later on when Tidus is describing to Yuna the experience of Blitzball in Zanarkand, he references that exact seat and says he has to be focused on the game instead of the distractions around him.

I just really like that a throwaway line was referenced later on in the game to describe an experience in Zanarkand. Especially because we as the audience get to spend like 10 minutes there, so when describing Blitzball to the only person who believes he's from where he says he's from, it's an experience that we remember, as well.