Here us a summary of 2 ways to approach life, A gene correlate would be the A- candidate gene COMT val/met. A political manifestation would be val-Democrats and met-Republican..
Heres the deal: The Apollonian wants to let reason rule life and the Dionysian wants to let emotion rule life.
The NPA connection then is that A- trait (met gene) finds life needing reason and avoidance of emotion white the A trait gene needs life of passion.
The heterozygous state met/val is Greek Tragedy.
A side note is that those with val/val actually do have more tendancy to alcoholism and other substance abuse issues So it fits that they would be more Dionysian.