I think meaning to do is a bit of a strong term for a lot of these, more they are things that I would like to have done.

FFI:
Beat on the original NES version.

FF2:
Beat it without stat growth manipulation (not likely)

FF3:

FF4:
Stat max out all characters on DS version
Do all DS extra content
Beat Japanese SNES Hardtype version
Play GBA version

FF5:
Play GBA version

FF6:
I think I have accomplished everything I want with this one. (Aside from playing it a few more times.)

FF7:
Stat max out Cloud for sure, possibly two other characters.

FF8:
Never play this game again.
Beat the game. (This seems to be in conflict with goal #1)

FF9:
Playthrough with different characters than I normally use.

FF10:
Complete all ultimate weapons
Complete content in International edition

FF12 & 13:
I don't think I have any more to do with these ones.

FFT
Start and complete multi-player content.