I would say FFVII is about dreams (as in life goals, not the images you see in your sleep). All of the characters are the downtrodden in society who band together to be a part of something bigger than themselves. Barret lost his job at Corel and became a terrorist. Yuffie's trying to raise money for her backwards nation. Reeve is the butt monkey of Shinra. Tifa seems to be doing alright as the hostess of a bar, but she's still poor like the rest of Midgar slums. Cid was going to be the first man in space. And poor Cloud thinks he "made it" as a SOLDIER 1st Class, but he really hasn't. Who are these nobodies kidding when they set out to save the world? They all had unfulfilled dreams.