Here’s a proper list of the numbered games I’ve played (excluding MMOs). As maybee said, though, this fluctuates a lot

12. FFX
11. FFVIII
10. FFIII
9. FFI
8. FFIV
7. FFII
6. FFXII
5. FFIX
4. FFXIII
3. FFVII
2. FFV
1. FFVI

It’s still hard to arrange them because I don’t think I actively dislike a single one of them