[Gozer]

From media interaction and third-hand reports (which is essentially just speculation) my read on the situation is that he's aloof and seemingly defensive with people.

Whether his dad caused it or is trying to help him manage his relationships is impossible to tell, but is apparently an issue.

I agree with moon that it is essentially an age issue, as he gets older he'll get better at managing people's perception of him and it's more of a characteristic than a character flaw.

Wilner has mentioned on the Fan590 that Rasmus considered quitting baseball to go work in construction while he was with the Cards (as did Romero in AAA). Tough to draw any conclusion from that, but thought I'd pass that tidbit along.