Whose Point of View is it Anyway?

Our fiction class discussion focused on point of view and psychic distance this past week. While I think we all are familiar with First and Third person narration, many of us were astounded by the number of different POVs. Being comfortable in third person limited, I rarely leap out of this POV so this was such an eye-opening discussion for me. Yet, now that I'm aware, I will purposely play with the other roles.

1) Observer narrator (first person)
2) Observer narrator (third person)
3) Detached Author (observant third person)
4) Involved Author (limited third person)
5) First Person Narrative
6) Let's add to this list: Second person "you"

My question is what is your favorite POV to write in and why?