surely the majority of people here have never owned or used all of the CV lenses.
As such, people can only judge by specifications or examples of pictures taken with the lenses. People then use that information to help them select a lens to buy.
If someone likes a lens enough to actually buy it, there has to be a reason. One could argue that right there makes it a favorite, even without actually having any first hand experience with the lens.
So sure, this poll is somewhat biased by what people own, however, the fact that people do own this lens is an indicator that it was "favorite" enough from the CV lineup to have bought it in the first place.
having said that, i currently own a couple CV's, have played with some others, considered buying others, and the only ONE I voted for was noted above. Not surprisingly, it is one that i still own.
The theory above about LTM's taking more of the vote share compared to the newer M's I think is accurate as well. Considering this fact further, I think that makes the presence of a newer M lens really noteworthy since it's been on the market for a shorter time and at a relatively higher cost to buy today. Despite those handicaps it still ranks highly.