Final Fantasy X was my first old Final Fantasy game. At first, I was slightly concerned because it's an old game, but after the first few hours, things got much better.
Anyway, the story is actually amazing; it's surprisingly well written and very emotional, arguably one of the best stories I've seen in a JRPG.
The gameplay holds up perfectly well; it honestly plays like a modern turn based game, still really fun and as deep as it needs to be.
The main characters are very good and they got even better in the process, even the characters I wasn't sure I would like.
The Sphere Grid is very interesting and the RPG elements are completely serviceable.
The music is awesome, the set-pieces are very nice and the CGI cutscenes are quite impressive even to this day.
Unfortunately though, the level design is extremely linear, and some minor elements in the game are outdated, like the puzzles, annoying difficulty spikes towards the end and voice acting.

Pros:
+ Fantastic storyline
+ Great characters
+ Enjoyable gameplay
+ Sphere Grid
+ Beautiful music

Cons:
- Very linear structure
- Outdated minor elements
- Difficulty spikes

Narrative: 9/10
Gameplay: 9/10
Content: 8/10
Characters: 8/10
Music: 9/10
Graphics/Audio: ?/10

Final Rating: 9/10
- Amazing -
Even after all these years, Final Fantasy X is still an impressive JRPG, as well as one of the most engaging, fun and technologically advanced games in the entire series. Some elements haven't aged very well, sure, but the journey as a whole is so beautiful, it makes the experience worthwhile.

Do I recommend it?:
Yes but mostly to those who enjoy turn based combat and JRPGs.
Must-play for Final Fantasy fans though.