One thing that comes to mind when looking at these pictures is that he's too clean. This is a deliberate choice that saves us time. We can always dirty him up in production.
Two other choices you might not notice easily:
- instead of a prosthetic he's actually missing a tooth, which is why he doesn't smile as wide
- he needs glasses but doesn't use them all the time. He keeps them in a case in his pocket.
These are meant to be noticed by the player... but not at first!