Take this response as opinion and not fact, for I am by no means a 'Fog Photography' expert. Through the years, the images I have seen with fog that I have really liked and thought were interesting seemed to be more about the
effect the fog had on the surroundings, and not the fog itself. It's been all different subjects and styles; urban/street scenes to landscapes, and everything in between. But in all of them, the fog didn't seem to be the 'in your face' main subject, but an element of the image.
There was some interesting subject or scene being affected visually by fog. I haven't had the opportunity to take many 'fog' photos, but have managed a few that I have kept because, well, I liked them anyway...lol.
I don't present these as benchmark images for great fog photography, but to share and to help with my opinion.
This was taken in February, in the greater Chicago area, which means Winter. We had a couple of feet of snow on the ground and then we were surprised by 2-3 days of upper 50's, lower 60's temperatures. This makes for a very thick fog! You got wet standing in it. The only time, I believe, I put power poles in an image on purpose. I liked the way they showed the thickness of the fog, each one getting fainter in the distance. The original didn't show much color at all, so I converted to b&w, and bumped the contrast a little. F/7.1--26mm--1/100 shutter--100 ISO.
This one was an early morning shot. Sun was just above the horizon and this is looking northwest. I liked the way it made the trees look. Some hazing in front of the trees, and the thicker stuff mixing in among them. F/5.6--70mm--1/125 shutter--125 ISO.
Again, I don't mean to show these as perfect examples of fog photography, but they're the best I have to help show my opinion about the effects of fog in an image. You should post one or two of yours and let us have a look.