I happen to like some of the flatties.. I just culled one because it wouldn't stand up.. but this one has been lovely..
I prefer the closed standards, but sometimes a color pattern or combination will sway me. I think if you look at which Iris are winning shows and awards, you'd probably find more of the closed standards. So, at least among judges, there seems to be a preference to domed standards. Here are the top TB's this year, starting with 'Haunted Heart'..
Regarding photos differing in colors.. There are two things going on. The first is the photography. Different times of day, different cameras can produce a broad difference in colors. My iphone produces very different pictures than my camera, and not always accurate..
The second thing is that many iris change from day one to day 2 or 3... I call some of Burseen's "changlings" because the color is so different over the course of bloom..
Here are day 2 & 4 of 'Sights unlimited'. These were taken with my camera about the same time in the morning each day.