According to careerbulder, there could be 4 possible types of difficult co-workers.

The Talker... just won’t shut up; always has something to say about something
The Kiss-Up… … craves mostly
The TMI (Too Much Information)… has no boundaries shares every piece of unpleasant and personal information with you.
The Gossip…… much like the TMI — as long as it’s not theirs.