With those foggy shots, Kathy, you have an area of sharp focus in the foreground; that makes all the difference. So often, foggy scenes just look out of focus because there isn't a good 'reference point' like these have.
And the trouble with the horse, is that it's head is at the wrong end.

If it was facing the other way around this would have been a really excellent image.
As it is, I suppose you could try to concentrate more on the horse and crop to, say, 4 x 5 ratio or crop much tighter at 5 x 4.
The bridge photos look fine to me.
ps. How do you get sunny afternoons; it just stays dull and misty all day long where I live. But perhaps summer will arrive shortly, at least it isn't bitterly cold with strong winds.