Dear Grandpa Jim,
Since I wrote a letter to my grandma last week, I think it's only appropriate that this one comes today (even if you are on the other side of my family). To you, the words don't always flow as naturally and easily to my mind. It's not because I loved you less or knew you for a shorter time - in fact, you were around through most of my high school years.
No, it's because of who you were that changes how I write to you now. You were always quiet and reserved and, if I'm evaluating it correctly, a little shy. You were never a big talker and what you did say, you kept short and sweet and to the point. You were always happy to sit around and soak in the conversation, even if you weren't a major participant.