Morte. Somehow he managed to be suspect and tragic (without being pathetic), and feel like a much better friend than TNO deserved. The poor little skull actually managed to make me feel like a complete bastard at times.
And of course, I had almost as much fun reading about his struggles with facial expressions, as whomever wrote him.
- That, by the way, I suspect is a large part of the reason PS:T works so well. Unlike most games, much of the stuff that goes on in PS:T isn't rendered in pictures. Instead the player has to apply imagination, and impressive as CG is, it's nowhere near human imagination. Obviously it helps that the writing doesn't suck horribly either.
That things like body language, odd local smells and such gets defined, does much more to bring a conversation to life than a couple of badly animated low-poly characters alone.