I'm not sure quite why nobody is replying to your post, perhaps it is because you have snowed us with rather a lot of pictures here. Anyhow -
My personal favourites are BW2b (the beach scene) and BW3 (the desert landscape). Both of these seem to be strong compositions, and are nicely done. My nit-picking observations would be that with this kind of landscape work you have to be an absolute fanatic for fine detail on every technical issue. For example, with the beach scene I just sense that the horizon is not quite
horizontal. Be good to level it up. And your lens is causing you problems in the lower corners, which are going soft.
As a B/W fanatic myself, I think you need to work a bit more on your conversions from colour originals. LR has all the tools you need to do this, but you have to be prepared to put some time and effort into it. These shots do at present look rather "flat", which is typical of what happens if you just convert a colour shot and hope for the best.
OK, I'll stick my neck out and give you my basic recipe (the rest of you can just go and giggle in the corner).
* Convert to B/W using the LR default settings (Brightness 50, Contrast 25 etc).
* Set EV so that specular highlights are just
* Set Black so that you have proper solid black in your key shadow areas. So at this point you have pegged each end of the Histogram.
* With certain photos, a touch
of Shadow fill can really work wonders now.
* Contrast will usually
be fine at the default 25, but if you increase it be careful not to lose detail in the delicate highlights.
* Detail will often work wonders on complex landscapes, by increasing the internal contrast of the image. A setting of 20 is a good start.
* Then, last but certainly not least, adjust Brightness to get your basic luminosity where you want it. I often end up around 64. This is effectively a mid-point gamma adjustment, remember. You can push it around quite a way without the image breaking-up, because the end-points of the Histogram are nailed down.
These settings are only a start, but should get you in the ballpark, as they say. If you already know all this stuff, then yes you can just write me off as an old fart