I think the experience is different for each person. Okay, so you don't have to use any techniques to have LDs -- that doesn't mean that those who do are having dreams that are any less lucid than yours. Also, I've never experienced this "shaking" you refer to, but have had some extremely vivid LDs where I knew that I could do anything I wanted -- and did so without fear. I just don't think that everyone necessarily fits neatly into the categories you are describing, or at least do not exhibit the same characteristics as you do.

Now, I have certainly had some (what I would call) "semi-lucid" dreams, where the consciousness of being in a dream was somewhat tenuous, and the ability to control things was sporadic at best. If you want to call that "pre-lucid", I guess that's okay, but it doesn't seem like a very precise term to me, since it doesn't usually lead into a fully lucid dream (at least for me).