The RecoGraphI am a compulsive list-maker (of movies I've seen, books I've read, people I've known at certain places). In recent times, I've graduated to collecting more and more data about myself. Of particular interest right now is recording how I am led to books, music, or films based on the recommendations of others (however, still in the realm of dream-ware)
Some recommendations turn out to be more precious than others, lending greater worth to the recommender. Recommenders can be people one knows, newspaper columns and TV programmes, blogs etc. A graph of recommended elements and people who pointed to them could be built. I don't know if anything useful will come out of this, but it just sounds like something interesting to know.
While on the subject, I wonder if secretly, I want to become like Gordon Bell. The data collection is the most painful bit.