A few things that stand out most to me when I remember my grandpa, was how much he LOVED hugs.
And, when I told him that I was pregnant with Benjamin (a boy) he gave me some advice that was very close to his heart (I know because of how he explained it, and the fact that we discussed it on many visits)... and I will cherish that. He said boys have a need to achieve, and that I had to make him feel special, and acknowledge his successes.
Also, my grandpa was such a bright and creative man. He loved to learn, and create. He even built a "witch's house" -- a little cottage for the grandkids. Grandpa was a great story teller. I really enjoyed listening to him... even if he had a tough time hearing me! :)