He's extremely proud from where he came from, so get him the latest shirt from his alma mater, in my case that would be the newest bruin shirt.
Get your dad a new wallet!
His dream is to go to Ireland to explore the coastal village where his family came from (insert whatever ethnicity your father is) , so get him an excellent travel book.
Your dad is tech savy, surprise him with the new Apple Sport Watch.
He doesn't have a current favorite television show because he's still hooked on his all time favorite. So treat him to the entire set, he will love it.
You know he will love the new Humans of New York Stories because he's a humanitarian at heart.