I think it started when I was a kid and read The Door into Summer by Robert Heinlein.
(Most likely that book, and others by RAH, is also the reason that I like cats.)
Another of my favourites is The Man Who Folded Himself by David Gerrold.
I don't want to spoil anything about Audrey Niffeneggers The Time Traveler's Wife,
so I'll just say that it's a story about a man that travels through time and his wife.
I like the way it's written.
Every chapter starts with a small heading with the current date and the age of the woman and the man.
Most of the book is written in chronological order from the wife's perspective,
she gets older as the chapters passes, while the man can be old in one chapter and young in the next.
I can't decide if I like the actual story or not.
This is just a feeling I have but it felt as if the story started out in the heads of the characters.
I could see what they where feeling and thinking, but as the story moved on, I moved further and further
away from the characters. At the end I just watched them from a distance, and I couldn't really see what
they where thinking about anymore.
Still, it's well worth reading and if she ever writes another book 'in the same universe' I will buy it.