I believe Calvin said something to the effect that if time travel could exist some day, why weren’t they all coming to visit him?
There was one TV episode where the guy invents time travel, and goes back to meet Shakespeare. Who is tired of all the time travelers interrupting him. Then they start to visit the inventor, after all, he is the guy who invented time travel.
I’d probably go back to visit Ben Franklin. Unlike a lot of other people in history like, oh, Augustus Caesar, Ben speaks English.