I could go on and on about why I think Nomura is a overrated hack. I'll just say that if he didn't have such a crack team of animators and programmers and game designers working with him, making his games somewhat fun to play and pretty to look at, he would have been out of a job a long time ago. The man simply cannot write or direct worth a damn.
Oh I can think of worse. Final Fantasy VIII had far more banal characters, a storyline that made me laugh at how contrived and unoriginal it is "oh look, the bishojo is going to make the cold and misunderstood bishonen understand and value love. Gee, never seen that before In a hundred other anime series. Seifer was the most pathetic rival I have ever seen, and almost all the side characters were cardboard cutouts of industry stereotypes that all have about one or two scenes of expansion before they are forgotten. That said I often find it the ultimate of paradoxes that in all this terrible storytelling, there is Laguana, probably one of the coolest costars ever in a final fantasy. It was this guy that kept me playing FFVIII. Oh, and lets not even talk about the gameplay. yah i'll just draw the same spell a billion times and never use it since I need to junction it to pump up my stats. And you want poor storytelling, shall we talk about FFX-2?For me, FFX is my least favorite in the FFseries.
As for Final Fantasy X, I like it plenty. FFX has one my favovorite plot twists ever, when Tidus tries to take the moral high ground with the summoners, talking about how they were all being used, and shouldn't have to give their lives. Then they just respond with how they know they are expected to sacrifice their lives, and that It is worth it to bring peact to so many, even if it is temporary. I would have liked it if the game had gone on for a little longer without any real moral high ground as the plot just became so much more interesting with that wrinkle.
As for the characters, Yuna is alright. I think the game made it plain that she did have a personality, it was just that she had to get out of all those years of conditioning before it arose. Her conflicted and dedicated nature I liked. Wakka and Auron were both well done, I often thought the most offensive thing about Riku was her voice actor, Lulu's demeanor and personality seemed to run counter clockwise with her character design and I think Sakaguchi had in mind a character similar to celes, beautiful but cool and restrained rather than the cleavage bearing prostitute Nomura advertised her as. Kimahri had the least development, but was still likeable and felt distinct. and I often think that the cast would have been even more likeable had square included the japanese language track. From the few clips I've heard, Tidus just sounds so much cooler than the english voice actor made him out to be.