Something I've been observing: another parameter that belongs to each center I believe is Alignment (the D&D style alignment). For instance; someone could be Neutral Good in their Heart Center (as main center), True Neutral in their Head Center (as second center), and Chaotic Evil in their Gut Center (and something else in their soul center). This is experimental for now but I think it's true. It could explain variations and multi-layering of personality.