Pro is an Anti-Hero who reasons that, for all the trouble he goes saving the world and all that jazz, he's entitled to some compensation.
Pro is part of a top secret espionage mission, who for reasons of secrecy, cannot use money or weapons supplied by his superiors, and has to steal most if not everything.
Pro gives something to every single person he meets.
Pro gets robbed by every single person he meets.
Subverted: Pro enters someone's house, finds a stash of gold inside a treasure chest... and decides to leave it there because the lady of the house is standing nearby.
Double Subverted: Then he comes back when the lady is out and takes it anyways.
Parodied: While warned to not open the box, the contents are actually completely worthless (like a shriveled mushroom) or gross (Boxer Shorts).
Zig Zagged: Perhaps it's just removing a middleman. There might be a point where, in the story the hero says "Say, we're on a quest to save the world, could we borrow something for our quest?" And the people living there say "Sure, honey, have an antidote". Taking the item is just avoiding something that slows the pace down.
Averted: Pro doesn't bother with people's houses. Or there are no houses.
Enforced: "Towns are nice places to relax. Why not add something extra to it?"
"Pro, stop that! Are you an adventurer or a thief?" "I thought they were the same thing."
"You know the law! If it ain't bolted down, too heavy, or on fire, it's fair game!"
Invoked: In an aversion of No Hero Discount, the townspeople inhabiting the houses tell Pro that if he needs anything in his quest to defeat the big evil, he is free to take it. After all it's worth their lives and freedom.
The Villain with Good Publicity spreads rumors of a no-good brigand who goes around stealing things from people's houses wherever and whenever he can. Naturally, when Pro comes to town...
Deconstructed: Pro enters a new town, begins to duck into every house and loot everything he can find... and learns the hard way that burglary is taken seriously in the area as the local law enforcement suddenly corner him and haul him off to jail.
Reconstructed: After the arrest, the law enforcement realizes that only Pro can save them from an upcoming menace, so they release him and promise a pardon if he can save them all.
Untwisted: Pro gives something useful to the other person for something useful to him from the other person's house.