The amount of favor earned with an NPC for an item depends on the Keyword Category and is proportional to the value of the item. For example, Velkort gives around 6-7% of a potion's value in favor and about 4% of a corpse trophy's value. (Anecdotally, e.g., 33 for a 500 value {{Item|Basic Stoneskin Potion}} and 0.2 for a 5 value {{Item|Feathers}}. The percentages quoted here are based on experimental results and are not exact.) Perhaps surprisingly, this ratio does not seem to be necessarily higher for Loves than for Likes, even on the same NPC.

<br>There are a few exceptions to this rule, as some items have Keywords that alter their value when used for gifting. For example, {{Item|Lead Figurine of a Goblin}} in the category [[:Category:Items/Figurine]] has the Keyword "Figurine=50", while {{Item|Brass Figurine}} has the Keyword "Figurine" (without an equals sign). The value of the goblin figurine is 10, while the value of the brass figurine is 200. When gifted, however, the goblin figurine will act as though it had a value of 50, so a single brass figurine will provide as much favor as only four goblin figurines, not twenty.

Further information on Keywords can be gathered from items.json and npcs.json in the public data at http://cdn.projectgorgon.com/, or possibly through third-party (generally player-authored) tools.