Six and seven are very similar in terms of 'the cast is a whole bunch of broken people'. The degree to which they were broken and whether or how they grew from that to some measure of peace or stability varies from character to character.
I actually think that's pretty cool really, but for whatever reason, that was warped (in Cloud's case particularly) into a bunch of them being these emo wrecks, which was... not really the point or arc of the story for most/many of them.
I bring up Cloud specifically partly because I've been playing Dissidia and he's driving me crazy, and partly because I went through FF7's story recently and realized that my memories of it were almost hilariously wrong in terms of both characterization and plot.
(Biggest bombshell to my brain,
Sephiroth
who killed Aeris )
Man, I want Dissidia on the PS4...