This project is all about identifying where the best place is to put the horizon and I've included some images of the Romney Marsh windfarm which made an interesting subject - although I was frustrated not to be able to get as close to it as I would have liked.
For me, the placement of the horizon depends on what else is interesting in the scene. So today the sky wasn't very interesting, just being blue with a few clouds hanging around the horizon so I wouldn't have made that a feature, but be more inclined to go with the tight views below. I've cropped the second one down to create the top and give it a more extreme appearance, but I do prefer that one best. The only difficulty is that the foreground isn't particularly exciting either. If the sky had been more lively I may well have gone with a focus on the big skies and a nice wide angle to compress the action together.
The two middle images just seem a little banal - a record of what is happening, nothing more, with no sense of interpreting the landscape or telling the viewer where to look.