Look on what i found on InfographicsShowcase.com: six typical profiles of users of Twitter presented with a great humor. 

So we have newbie, brand, smore, b1tch, maven, mensch. The last two: maven and mensch are these one you should follow because most likely you will learn something from them. If you recognize a b1tch you are advised to block it;). Happy tweetering.

Click on the photo to enlarge it.

created by @ngonews