Final Fantasy series is pretty hit or miss. In general, the gameplay isn't really exceptional, so it more depends on what stories resonate with you, which kind of varies from person to person. Out of the ones I played I loved X and VII, somewhat disliked VIII, couldn't get into XV, liked XII but got bored partway through, and found 13 to be a chore.
That's so weird for me to hear because I grew up on the original three Final Fantasies (I, IV, VI) and they were all incredible. Played part of VII as well which was also awesome. I know SNES/PS1 was the height of Square's powers and almost everything they made back are among the greatest RPGs ever, still funny to hear someone says Final Fantasy is hit and miss, clearly though it's the later ones, PS2 and later.