2) Secondary judgement is something you use regularly to make your decisions. Tertiary position is 'relief,' which ends up being indulgent if the person is pressed too far. Aspirational comes out even if you don't want it to and would like to refuse it, although it's usually evident as back-up for the primary. I'd almost say it's 'louder' in aspirational than tertiary.
3) With Ne on top it'll be mostly concerned with possibilities. With Te on top, it'll be mostly concerned with getting things done right, with possibilities tagging along after with constant nagging suggestions.