Papyrus is, well... kind of out of control with what he does. He usually comes up with very complicated or very vague plans that usually works and naturally loves any sort of puzzle, and is a natural problem solver even if he tends to overlook things. He has random tendencies and can develop distastes for people extremely easily and tends to get slightly frustrated if things don't go his way, Um, his voice is kind of hard to explain. I guess, just try voicing Papyrus however you think he should sound, and I do have a really, really bad example in the video if you really need it.