Likes, dislikes and to do

I watched a fair few movies in my time. And read a few books, listened to a few bands, played a few games and surfed a few websites. What I'd really like, all in one place (read: a website), would be a database of those things I'd tried, those that I'd liked, those that I disliked and those I'd liked so much I want to experience them again.

Social bookmarking goes some of the way, as does the likes/dislikes on Facebook/MySpace, but this would cover every type of media all in one place.

And it would be an advertisers goldmine: how easy it is to target adverts when you know exactly what people like.

A social element of this site would be in recommending and reviewing media.