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.
Interesting feedback ... I'll play with a B&W conversion on the second image and see what pops out ... I typically have to resist the urge to convert to B&W as that is my natural tendency - so you don't have to ask twice! I've always though that an image that didn't work in B&W usually just doesn't work ... and I only leave images in color when I feel that the colors add to the overall intent. My instinct is to convert almost everything to B&W - but the reality is that digital has forced me to dive into the world of color in a way that was a bit unexpected ... I have a lot left to learn and that is why it is fun, but I finally have my head around color spaces and output gamuts etc and I'm intrigued by color in a way that I never was before.
If it weren't for the dark sky, #2 would be my favorite with #1 a close second. This was also partially caused by the polarizer I think. As processed, I like image #1 the best. It prints really well.
I'm gonna go back and work on #2 and #3, but I feel like #1 is as good as is gonna get.