They'd probably learn that I'm not unintelligent, that I'm not actually cold-hearted, and they'd probably figure that I don't pretend not to like my sister - it's an actual feeling that isn't going away and it's not for attention.
I would like to see what it's like in my mother's shoes. She's always wound so tight and snippy and was never very emotionally supportive so it'd be interesting to learn the reason behind that.
They would see a lot of bitterness and cynicism, but also infinite hopes and dreams for the future.
I would like to walk in the shoes of someone from a very different culture, someone who faces challenges that I can't begin to imagine because their life is so different from my own. It might be a difficult/depressing experience, but also be an invaluable one. I would come out of it appreciating life so much more, filled with so much more compassion for people.