Beaten:

FFI
FFII
FFIV
FFVI
FFVII
DoC: FFVII
FFX
FFX-2
FFTA
KH
KH: CoM
KH2

Played, but not beaten (yet):

FFMQ
FFV
FFVIII
FFXII

Planning to play (and beat):

FFIII
FFIX

Will probably never play (due to localization and/or lack of platform reasons):

FF: CC
FFVII: CC
FFVII: BC
FFXI
FFT