I exactly agree with you. Who I am is defined by the worldline that I have so far traced through spacetime, which is unique to me. The only issue with that definition is figuring out the thing that traces the worldline, because it is obviously not the atoms I am composed of, for example. A few moments of reduction lead one the conclusion that I am an information pattern, a sort of soliton on a particle sea. Furthermore, I am this particular information pattern.

(Oh, you probably know me via ghoti, and benparker. I was in Ben's year at Pembroke.