To get a quick overview of what type of Twitter user you or your friends are check out Tweeps.Info.
Entering a Twitter account name into Tweeps.Info produces the following answers:
What do they tweet about?
How much do they tweet?
How social are they?
Do they use hashtags?
Do they share URLs?
Tweeps.Info
I was surprised to learn my Twitter account registered under any of their metrics.
I was even more surprised Tweeps.Info had data about each keyword’s usage:
google is a keyword used regularly by 2.67% of tweeters in our tweeterbase.
@TimCohn | Author Tim Cohn's Blog 