(Sorry if it's not totally related to the thread)
I stim all the way it's possible. Hand flapping, foot shaking, fidgeting, rocking, walking back and forth etc.
When I was little I liked to spin around and I was stimming with my fingers even before I was born! I don't need stim toys, I can stim with anything. ^^
Stimming is like breathing for me, but if someone ask me to stop, I'll change the way of it to a less noticeable one. I like monotonous clicking sounds, so if I stim with something it can be annoying. ^^'
I'm more the person who freezes when nervous and stims while thinking/when excited, happy, mad (this, like... never), overloaded, "underloaded" etc. Stims of different emotions have different 'patterns'. Like small electric discharges. Happy stim is tiny, and fast or normal, excited stim is huge and fast, sad stim is slow and hurts (like little hits to something), overloaded stim is huge, unpredictable explosions, and 'underloaded' stim is repetitive and smooth. Etcetera.
A little bit like this:
I guess you are a different kind of human
Oh, sorry, what was the question?