Loved the Time Machine! Rod Taylor, one of my favorite actors. (And he's an Aussie!).
I like the stories that work with the paradox of the affects we have if we do or don't do something and what happens as a result. The New movie coming out soon called Frequency has something to do with that. And the "Back to the Future" series and Time Cop delt with that too.
We have time machines now. Planes, Trains and Automobiles; Phones, TV and the Internet.
Can you imagine how long It would have taken for me to get this message to you 1000 years ago; 100 years ago; 50 years ago; 10 years ago?