Borderlands characters seem pretty much tailor made for this... Dibs on Axton!

Now what gun to bring. The swordsplosion shotgun would be funny just to throw at some poor medieval schmuck. On the other hand there are just some wonderful dialogue options with Shotgun 1340. ANY Maliwan gun just because lightning/fire/acid.

EDIT: Nearly forgot the Close Quarters Teacup, the Bane, and that Torgue pistol shotgun rocket launcher.

So many choices!

"Faster, stronger... more sexually attractive." -On level up.
"You get a bullet, you get a bullet, EVERYBODY GETS A BULLET!" - After a massacre.
"I love this planet!" - After nearly dying to a badass.