What.... 800 ISO as the top! No way Jose, 800 is just getting your foot in the door. Here are 1600 and 3200 samples from the same day as my 1st entry after the first light vanished. Ironically 3200 shows somewhat better than the 1600. Most likely I pushed something too far in PP on the 1600.
Traveller, I think that 6D was the best thing that ever happened to you, from a photography standpoint. (I'm assuming most or all of your entries in this challenge were made with it.) - Ken