Well, let me think. The baby ghost wanted its rattle, and the miserly ghost wanted his gold, and the soldier ghost wanted a medal he'd lost. So it'd be something that's not only important to you, but also that rather...defines you, in a way? If it were to follow the pattern, that is. That might help to give you some idea.

How terribly odd. I might very well be standing right on top of you just now, and we'd never know it if we weren't speaking with each other over the Network.