I'm in agreement with you on the motion of the light. In the '70's and on into the early '90's I used to have this light. This is not mine, I happened to find a picture of a similar one.
I now have a leg band that will glow green when I turn it on and I also have pants clips with reflective tape. One other advantage of these type of lights is that the are not married or mounted to the bike.
As for advice on what is good nowadays, I don't know. Perhaps the glowy band.