Usually, I don't consider this a disadvantage or a negative in any sense. It's nice, having someone next to me always who understands the way that I think and knows (most of) my deepest fears and the thoughts that I don't really verbalize. But on that field trip, where our invisible connection was materialized, it became clearer and clearer that us-against-the-world could be lonely.
I read these posts and think maybe a little derisively, Pfft, I can totally do that, or with a mix of awe and bitterness, I wish I'd done that. And then I go to bed unsatisfied, feeling the urge to do something amazing, but unable to figure out how to do something like that.