I like to look at stamps sometimes. Stamp collecting is a popular hobby.
I used to have a few stamps from my hobby as a child.  What's your oldest stamp?
I do not collect myself. I look at others stamps or stamps online. There is so many stamps to collect. 
Oh, what are your favorite stamps to look at?  Aren't there many different variations?
I like to look at stamps of famous people or stamps that are dedicated to activities. It is relaxing. What did you enjoy about collecting stamps?
I liked to collect the stamps with baseball players on them.  I love baseball.  Have you seen many baseball stamps?
No, I have not seen many baseball stamps. That's what is interesting about stamps they are so many different areas and subjects represented by them. 
That is true.  From the stamps you have seen, what would you say is the most common stamp subject?
I would say historical figures. Collectors seem to love people from history.