Exaggerated: Norman asks Hawke for all of his Potions, plus some expensive weapons and armor — things Hawke can easily buy, so long as he has the money...
Downplayed: Norman asks for "anything". In truth, he'll reject really useless Vendor Trash, but accept a really common item like an apple.
Norman has some information Hawke might find useful, and is trading it for some items he needs.
The particular type of item(s) Norman needs are very common and can be found in most stores... in another country, which the wandering hero Hawke has recently visited/will be traveling through shortly.
Subverted: When Hawke talks to the NPC, he mentions that he needs some potions... then walks past him and heads for the local shop.
Double Subverted: ...Only to learn that they've just sold out of potions. Then he turns to Hawke and asks if he has any he can spare.
Parodied: Norman hands Hawke his shopping list of adventurer's staples... and bread, milk, eggs...
Zig Zagged: ???
Averted: Nobody asks Hawke to bring them common, store-bought items; if any requests are made at all, they're strictly for Plot Coupons.
Hawke: "So, Norman, why do I have to give you the item? There's a store right over there." Norman: "Because you just have to, that's why."
Invoked: Norman is actually working for the Big Bad, who demands a useful item from the Hero to hinder his progress.
Exploited: A town guard asks Hawke for a Healing Potion in order to restore his strength for the night watch. But if you give him a Sleep Potion (which looks almost the same as the real deal) instead, you can gain access to the building he was supposed to watch in order to get some nice items.
Defied: "I'm not a shop, buddy. You're a big boy, trundle over to one, and get it yourself."
Hawke: "Store's right down that street, you know." Norman: "Well, not everyone can tear through Money Spiders, you know. I'm arachnophobic, myself..."
Played For Drama: While exploring the sprawling city he's just arrived in, Hawke meets a beggar who asks if he can spare some change or a paltry potion. Whether or not he actually hands one over, the beggar turns out to be part of a gang of NPC thieves who accost him, trying to steal everything he's got.