Everyone accepts VII was the best, but people are tired of hearing about it, and it's now considered cool to pick something else. So we see VI appearing as number one. Vi was cool, but VII was a turning point for the genre, and the gaming industry as a whole. Alexander, Cloud, Aeries, oh sweet, sweet Aeris, sepiroth, Red lion, the approaching asteroid...and of course, chocobo breeding! Who wasn't stoked to get a Chobobo that could cross mountains?
Trying to convince me the Wii is a real adult game machine 'if you play it right' is like trying to convince me Tofu tastes great 'if you just cook it right'