I love the commentary from players on their cards when they autograph them. Here's a couple, which I think show the personality/humor in them...
Barry "wished he looked like this picture now" - what an amazing statement, which captures the phenomenon of the retired and aging formal ballplayer. He would live another 20 or so years after signing this, so he probably didn't look too much different from when he hung up his spikes 20 or so years earlier...
I always felt that he should've signed his catcher pose card with this comment; but, I suppose he was just answering a question from his letter-writing autograph seeker...