And about Bilbo.
One of the most gratifying things about
"The Battle of Five Armies," or Hobbit Movie no. 3,
was watching Martin Freeman's performance as Bilbo Baggins.

Particularly when he was face-to-face with any dwarf,
and particularly Thorin Oakenshield.
He has after all done some pretty spectacular burglaring
and kept it secret from everyone, in fact
he has lied about something that Thorin wants for himself.

And Freeman worked hard at the actor's business
of showing Bilbo saying one thing and thinking another,
while facial tics and twitches gave him away.
I have to concur with the Mudcat member who posted
that as characterizations go,
Bilbo is far more interesting than poor self-martyred Frodo.