Some albums I really want to have physically:

RAINBOW
NEXT LEVEL
Love Songs
Party Queen
LOVE again

And maybe M(A)DE IN JAPAN.

100% agree! Bummed to see such little A Song for XX love in the voting, lol. Sonically, it may feel a little dated, but lyrically, it's superb.

ASFXX I think is a must just cause it's the first album and the beginning of it all!

My top 5 recommended for newcomers:
1)LOVEappears
2)Duty
3)I am
4)(Miss)understood
5)Love Songs

My personal favorites are ASFXX, LOVEappears, My Story, Next Level, Party Queen, COLOURS, and M(A)DE IN JAPAN. :>

I honestly feel that she has only two albums I just don't care for: LOVE again and Rock 'n' Roll Circus. Even then, they are still pretty good.

A Song for XX, LOVEappears, I Am..., Rainbow, Next Level
and Colours as well

Duty
Next Level
Rock 'n' Roll Circus
Love Songs
FIVE
Colours

(miss)understood;
Secret;
GUILTY;
Love Songs;
RAINBOW

In terms of theme and genre consistency among the tracks, I think LOVEppears (dance tracks) and MY STORY (pop-rock)