Hi, I'm a Christian. Help Me Disprove My Religion!

[Aractus]

Nothing tells us that the author Paul and the character Paul are one in the same. 

Yes it does - modern scholarship tells you that. Just like Luke-Acts is written by the one author.

-but this hardly matters..you'll find 1st person narratives in Dracula as well.  Nestled within that quoted comment is every reason you need to understand why the narrative POV is irrelevant, both "Paul" and Psuedo-pauline epistles are written in the first person.........clearly this POV is a device that various authors used to lend weight to the narrative.

Rhythm you have a clear lack of textual criticism knowledge. The POV is not a "device" for anything, it's what scholars determine when asking whether a narrative is contemporary or historic and has more to do with whether it's written in the first-person-narrative or the third-person-narrative.

Tell me, is "Paul" in Tacitus, Pliny or Josephus?

Why would they write about Paul? The only undisputed part of Josephus where he mentions Jesus is where he uses him to clarrify which James he's talking about, and he has almost nothing to say about James. He has nothing to say about Peter or Barnabas either Rhythm, so why would he mention Paul when he only mentions one of the early Christian leaders?

Even the character of Paul is a different beast from one narrative to the next.

So what? I already said that. Historians have little idea about the character of Shakespeare you know, but that doesn't mean he didn't write plays. Historians have different opinions on how to characterise Hitler's character, but they don't doubt the actions that he took or the political ideology that he belonged to.

And by the way you don't even know what you're talking about, because we do get a consistent character from his writings. But he isn't writing about himself.