I've never had that happen to me. I don't know if I'm insane or simply so fascinated by this character than talking as though I am that character is simply the way of the game.
So, to determine whether my sanity has been compromised, I'd like to ask all of you whether you've ever had this kind of experience. Let me know in the comments! You can also tell me I'm nuts and should seek medical attention, if you so desire.