With Deadpool you gotta be breaking that 4th wall. There are really 3 characters with him. He has one conscious who is sensible or and [i]tries[/i] to be intelligent, the important thing is that he tries but fails. He has one that is a complete and utter idiot who just wants to kill everyone and eat chimmychungas and then his actual talky self where he often chooses to take one side or the other. Even without those voices he is a bit crazy.

the interesting thing with Deadpool is while Spiderman in cartoons and sometimes in comics breaks the 4th wall to the point where he speaks to the reader/viewer Deadpool often knows he is in a comic or such.