I stopped by your blog last night and looked around. You have a great location there, a great situation. I think if you consider "tall or wide? tall or wide?" on every shooting opportunity, your potential for growth as a photographer will be hugely accelerated. Ask yourself, "Is my subject taller than it is wide?" If so, then a vertical camera orientation, often called the portrait orientation, makes a lot of sense in many situations. People LOVE to look at pictures of people. When the person pictured is just a face, the vertical orientation literally allows the face to be shown larger on-screen than when the camera is held in a horizontal orientation.
When a person happens to be sitting, and shown as part of a "scene"...then it makes sense to consider that the subject might be the scene, and that a horizontal camera orientation might be the better approach; a great example would be the woman with the pig on the beach: there, the entire scene, background, beach, the cottages, all of that, is a very important part of the idea, and so the horizontal framing you did on that shot is the correct choice, for sure!
Unless your camera shoots to a square capture format, virtually every single photo opportunity needs to be evaluated as, "Tall? or Wide?", before you even bring the camera up to your eye. It's a critical decision.