The Chipper: The person that is always happy about everything no matter what it is. This type of person always tell you to "smile more silly" or to "look on the bright side."
The High Guy: This person is always going on existential rants about mundane subjects. Even an empty soda can can set them off talking philisophically about how the can represents our soul and the carbonation....you get the idea.
The Man Child: This person is in their twenties but hasn't learned to act as an adult would. They are not aware of the volume of their voice, they dance around in public to music that only they can hear, have no sense of personal space, and don't like to distress themselves with real problems.
The "I" Person: No matter what the topic of conversation, they can always turn the discussion back to themselves.
Example:
John Smith: "I just got a call, my favorite Aunt died last night she was...."
"I" Person: "My Aunt died 3 years ago, yeah, I was really broken up about it, but I think that I learned something from it........."