Twitter: Who you Follow Defines You

The main theme of Robert Scoble's recent post on the Scobleizer seems to limit the amount of people who you follow on Twitter. Robert gave a great example of how Chris Brogan follows over 90,000 people on twitter, but there is no possible way that he is able to see all of those tweets. Even Robert (who only follows 1,900 people) has a hard time seeing half of all of his tweets through tweetdeck and other twitter applications.

Robert takes a different approach to following people on twitter, he focuses on following only a certain amount of people intimately. Among those people followed are obviously family but then early adopters, influencers, and thought leaders. Everyone though has a different mindset in terms of twitter followers. What's your approach to following people on twitter?