Re: your number one technique
Sheesh - this is degenerating. My favorite technique (my Tokui waza) is ushiro ate - for me the ultimate of timing, speed and I just love collapsing the collapsing of spine if you get it right.
It is a fallacy that people rely only on their tokui waza - no these are the techniques (and there may be more than one) that feels right for your body, that you practice more than most and that you are most likely to pull off if the correct situation arises. It is through the tokui waza that you can bring your art to its higher levels.