I like Time Traveler’s Wife, not because I enjoyed the story (there has been many films that tackle the same issue before) but because they had it correct about time travel.
When you time-travel, you do not carry with you nothing, hence, you are naked. Which is what they do in the movie. Another thing is, that you cannot alter what had happen or what will happen…which they also respect in the movie.
Good film to watch with your significant other.