I am with you in many regards with a few differences. First pain is less an objective and more of a component. I like NT more than any of the above.

I never heard of nail dragging before. Closest I saw were iron claws or scratching with needles.

I disagree on the dull pain, especially BB. I do not think that unexpected works except occasionally. First if I don't expect it I might block it instinctively. Secondly one blow does not accomplish that much, it is the accumulation.