So I would like to know what exactly makes the structure of Final Fantasy 10 feel so fresh

So don’t get me wrong in that I have been really enjoying the game lately as I just beat the Yeti in Macalania Woods, and I wanted to see if I could understand what makes the game so unique in the age of modern Final Fantasy games.

Sorry if this turns into a post that bashes Final Fantasy 13 itself, but I had to ask this specific question because despite having invested in Final Fantasy 10 personally, I wanted to see if I could have a moment of observation to understand again just what makes the game so unique in its overall presentation.