I definitely prefer reading. Reason being, while you're reading the story, you get to involved with it, running your imaginations and creating your own picture of the scenario. Watching it on screen is good too but you often feel like a spectator just enjoying the show.
And though there are highly praised movies based on books, they can never match the effect books bear with them

I prefer reading mostly because I am a bookworm.BUT when you watch something,it can happen to have no depth.You can't put yourself in the character's shoes.The storyline can confuse you sometimes because you weren't paying attention to details.When you read a book,you read each and every line.When you watch a movie/TV series based on a book,they (the writers,producers) can alter or change certain details.

i think reading the story is better altho i dnt really like reading, reason being they do miss sum things out, in the movie they cut it a little bit short where as the story u get full detail like the twiilight saga, sum things wur not mentioned in the movie but wur in the story which i would hve liked to knw becos i cheated and watched the movie first n then read the books wur slightly different!!, same storyline, but more detail!!