Final Fantasy VII: What Lord Golbez said, show more of Midgar. When you get the key to get back in, it should allow you to gain access to Sectors 1 through 4, and maybe Sector 8, even though you partly go there - but then, you partly go to Sector 1 and Sector 4, but it's quick, and you don't see any of the town like places, or talk to anyone who lives there, or anything.

Final Fantasy VIII: Do some more stuff with the other main characters, even if it's just optional. You really have to dig to find stuff about the characters in the main party who aren't Squall or Rinoa, and even then you don't get that much. Also some sub-games would have been nice if they could have incorporated it (they do all that stuff about T-Boards, and do nothing with them in gameplay.)