It depends on the story line, but i would have to go with books, i myself have a book shelf in my room filled with books and enough crammed in it to fill a second. I have read the book eragon and eldest both 10 times each and at least every book in my collection, around 125, twice at the least.
-Reaper

I only read both once even though they are so great. The only bad part is that the excitement and suspense leaves you the second time you read a book

It leaves you hanging but i don't know if you saw this or not but september 23 2008 book three will come out and also its a four book series and not a triligy anymore.
-Reaper