Interesting Twitter Tops

HappyGrumpy - sentiment analysis tool, has published interesting lists:

• List of Most Emotional Twitter Accounts
• List of Most Happy Twitter Accounts
• List of Most Grumpy Twitter Accounts
• List of Most Followed Twitter Accounts
• List of Most Active Twitter Accounts
• List of Oldest Twitter Accounts

Also, pay attention to their Alternative U.S. Presidential Campaign Poll which is based on twitter sentiment analysis.