But it also makes me think Si dom for you, like you were saying, because I think those with Si as a secondary function like a bit more variety.
All of the lists, timing yourself, etc, seems pretty seriously Te to me. My ISFJ mother-in-law, on the other hand, is exceptional at making quilts, doing puzzles, which I see as more Ti-oriented activity.
You know, ISTJs also see tradition and family and the social group as being important, so that could be why I was thinking Fe. My ISTJ dad, when he was angry with me, used to talk about how selfish I was, how I always put myself first. But he definitely has that tertiary Fi- getting angry when my mom makes something he doesn't like to eat for dinner, hiding out by himself in his office, getting defensive when people disagree with him, etc.