Well, the kids are better off learning about the strange ways of the world at home
I actually love these discussions. It's not just the good will, enthusiasm and comradery. But what I can learn myself. I have an interest in sports performance, the analysis of approach and out-come etc... believe it or not :ha
So regarding lean angle etc, the things that come to mind regarding your great photo's are this:
1-You have large nuts.
2-If you lean it any further you will crash.
3-The greater the lean angle, the longer it takes to get the bike
up-right and fully on the gas.
Points two and three are superficial technical issues. Point one is a Primary asset. You can learn technique, style etc, however, commitment and self belief are qualities that come from within, and can't be purchased, or easily acquired.
So I'm watching and learning with interest
