I like the last image best. It is well composed and the foreground rocks really stand out; if cropped, they can stand on their own as an image. Two points: the image does have a 3-D quality to it which strikes me as unrealistic for natural phenomena; this worked against you in the sky which is clearly black and gray as if it has a ghost echo.
The first image is beautiful and well composed. Even the left rock outcrop is minimal and blends right in. But the water strikes me as unrealistic in BW format. But that is just me, as I notice many BW images look unrealistic when it comes to moving water.
The second image just does not have the drawing power or interest of the other two. While your points on polarization are well taken, remember also that the sky naturally turns bluer as you look away from the sun, almost the same as at right angles to the sun. Polarization only becomes an issue when it is pronounced and excessive or improperly used to remove all or some spectral light that should be there. I note your second image looks better in BW, at least to me.
But overall, I think they are good images.