I spell in my head too.

I also picture the words in a partition - balance out the amount of letters, like a six letter word would go in 3 sets of 2 or 2 sets of 3 .... it's crazy, right?

a little OCD maybe? Or just a part of my anxiety disorder.

I don't do it all the time, but enough that I noticed it in my twenties.
It seems to have tapered off though time.

I draw patterns also. hmmmm

tc, nightbird