Vertical photos

Today I explain why my flickr page has more vertical shoots then horizontal one´s. Lately I´ve been posting more and I realize that horizontal photos are more pleasant to see on the blog, the vertical one´s don´t seem to have an attractive display. So I´m selecting the horizontal format to the blog and leaving the vertical to flickr, clearly you'll find there a bunch of them almost in a row.
I use the vertical format not because I don´t know how to use the camera horizontally but because it´s all about composing the picture. The vertical format concentrates most of the times what I want to capture leaving no need for crop in post-processing. Becomes almost a much more quicker move when photographing because of the fast framing, at least for me.
When I shoot horizontally, for example, I have to analyze better what is in the frame besides the object I want to focus and check the foreground/background. As well if the negative space when exists makes sense or not. Details like that do matter because the goal is to avoid cropping all photos taken.
But of course the horizontal format it's more commercial and used like in stock photography, contests, etc. In the other hand vertical is very used in portraits.
So I may say that it´s like parking a car not with the front but with the rear, few do it with the rear when you can do it with the front part, apparently it´s more difficult and people do it less often.
I have above examples that show my choice between the two formats and why I did it - having the time I always explore the two possibilities.
On the first example and from the same spot the vertical shot allowed me to include the main line of the field that leads the eye to the moon and the moon. Landscapes look good on horizontal but in this case the result would be more trivial I suppose. 
The second example at sunset with the scenario getting darker there was no advantage on using the horizontal reducing therefore the dark areas. But then I must admit that the horizontal pictures give another feeling when we look at them.