This kind of echoes others above, but for me, the worst thing is my inability to believe that good things will happen and stay that way... that they're not just fleeting moments in time. Don't get me wrong, I'm happy to be able to see these happy fleeting moments in time (as there was a time I couldn't see them at all), but I have a hard time gripping the fact that it's possible for good long-lasting things to happen, y'know?