FFIX has the best writing of any game I've ever played. It's brilliant.
As weird as this sounds, I think I agree with you. No game do I remember as many scenarios from more than FFIX. The writing and pacing is just superb. Sakaguchi really looked to improve his craft at storytelling in FFIX, and it really shows. The way the plot flows, the Shakespearean banter between minor characters to ease the tension, the well-place but never overbearing comic relief, the interwoven character arcs and converging plots. The whole thing was just crafted so well, and it never gets tiring or tedious, which is such an easy trap to fall into with JRPGs.
It opens with a play, it closes with a play. Each disc represents an Act, and each act ends in typical fashion. ATEs allow the action to jump around, scene to scene, location to location, breaking from the main plot or elucidating minor points for exposition, theme or just comic relief. And the heroes get split apart multiple times along the way, with multiple plot lines eventually converging together multiple times throughout the entire narrative. A great example of the pace and charm of the writing is Disc 3's "Love Letter" sequence, which, without spoiling, might be one of the most charming gaming moments I've experienced.
Anyway, bottom-line, is while there may be better games in terms of writing, FFIX might be the most well written.
Also, this is a great read on a critique of FFIX from a narrative standpoint:
https://medium.com/@danrcrabtree/final-fantasy-ixs-shakespeare-6cd498e15248