I have never (that I can remember) done hand flapping.
(Other than "flying" when wearing an oversized sweater or something, my "wings". Since I was attempting flight it wasn't random or purposeless.)
However, I have had some assorted odd behaviours, but I don't know if they count as stimming. I can stop (okay, put off) any of them, and I've read it's supposed to be uncontrollable.
When I was very young, I was a nose picker. I was eventually shamed into stopping that (publically anyway).
Then for a long time I picked at my lips, often until they bled a little. I tried to stop doing that, but still do sometimes. (I can stop, but I'll start again later.)
Next I started basically chewing the skin on the ends of my fingers, often until they bled. This one was very hard not to do. I would occasoinally resort to putting on fake fingernails to block my access. (I was never a real nail biter though, I would nibble them a bit if they got too long but that's it.)
The more stress I was under, the more I did these behaviours.
Eventually, my "chewing tooth" became worn to the point it would hurt when I chewed my fingers, and was becoming obvious to look at as well. So I stopped, except for very rare occasion.
I could (okay, can) trade one action for another, but can't just avoid them all.
Now days, I still pick my nose in private, but doesn't everyone?
I still pick my lips some, but I try to keep it under control.
I almost never chew my fingers, but sometimes I just can't resist. Especially whan stressed, or strangely enough, when watching old home movies recently. (Not sure why that set me off.) I do pick at them with my nails, but can't do much damamge that way so I don't care.
And wierdly enough, I sometimes do my toes like a cat, especially when relaxing or comfortable.
Do these count as stims? I'm just really not sure. It sounds like stims are more of a spastic uncontrolled movement.
And, to save you the trouble of looking me up, I am diagnosed with Asperger's and ADD.