TPM - People helping people, symbiotic relationships, and the dangers of fear and greed.
AOTC - Distrust and further corruption of power.
ROTS - That even the purest of motivations in love can be twisted into doing dark deeds.
ANH - Hope.
TESB - That things don’t always go as we hope and sometimes there’s hard truths.
ROTJ - Love and faith ultimately triumphs. Redemption.
TFA - No idea.
TLJ - Failure and learning from the past.
TROS - No idea.