Well, I'm going to avoid the Physician and soft engineering. I'm either going to pick "Hard" Engineer or the Geographer. I'm going to be Hans Bottcher. Like in the intro, he's an alcoholic. He'll be slow to trust, and only talk to people he does trust. So basically at first he'll be quiet, and maybe a bit "angry". I'm still working on it, but that's what my thinking is so far.
[b]Edit: I'm probably going to be a Hard Engineer, not a Geographer.[/b]