I prefer Third Person. I have a few reasons for this.

First, I like to switch points of view between characters frequently. Writing the entire story based from one perspective is boring. I think it's also easier developing other characters' personalities this way (instead of having their personalities be based on whatever that one main character thinks of them).

Second, I don't like having the entire story based on the views, experiences, or thoughts of only one person. I like having multiple main characters of equal importance.

I guess that's basically it? I'm not too great at explaining these things so bear with me =P.