With a time machine i would go back in time and make sure the Teletubbies never existed.
And wouldn't even care about any paradoxes, oohhhh god i hate that song
Interesting thing would be to travel to the year when jesus was supposed to be born, would really be interested to see if the story is actually true or not.
Or travel 500 years into the future to get a glimpse of what the world would look like.
But you know what they say, curiosity killed the cat
Movies based on science fiction are my favorite genre but is the time machine really only science fiction ?
Call me crazy but i do believe it may be possible sometime in future to unravel the mysteries of time travel and to actually build a real time machine.
Check out the link, it's a lot to read but very interesting stuff
hawking - space-and-time-warps
Bending space together and establishing a straight line between them like a worm hole traveling thru them like in that movie "Event Horizon", in theory same could work for time travel itself, bend two different time lines together and travel in a straight line in between future and past. Like "Bill and Ted" with their telephone booth or "Doc brown and marty mcfly" with their DeLorean or the people from the movie "Timeline".