Be Careful, Little Hands, What You Tweet

I started reading an article in the ALA magazine last night and I'm still thinking about it this morning.  It said that Twitter has given the Library of Congress permission to archive its Tweets.  The claim was that the Tweets provide valuable information into our culture.  So, I started wondering what the 40 or so (?) Tweets I've published over the past year or so (?) say about me.  How much of myself and my cultural values can one glean from reading 140 characters of type composed out of boredom, mainly?