I love the process of unpacking something. You design a ritual of unpacking to make the product feel special. Packaging can be theater, it can create a story.
Even a dwelling is a device that generates a distinct pattern of daily activities and their relationships. Some buildings are explicitly built for ritual, but the repetition of any activity, either mundane or religious, tends to ritualize them, and by facilitating this, an architectural structure can turn gradually – sometimes even unnoticeably – into an instrument of ritual.
The association of comfort with people and place are reinforced by the ritualized use of a place. Using a place at a set time and in a specific manner creates a constancy as dependable as the place itself. It establishes, in time and behavior, a definition of place as strong as any architectural spatial definition, such as an aedicula, might be. Ritualized use can do more than reinforce the affection for a place. Through ritual, a place becomes an essential element in the customs of a people.
Perceptual: "They couldn't figure out what to do next", "they couldn't find the feature", "they didn't know they could click that button..." etc.
Domain-specific: "We need a way to jump back here because in their workflow this happens..."
In general, usability testing only catches type 1 perceptual problems. Because in those tests you take people out of the real world and assign them tasks. Usability testing doesn't catch domain-specific problems because they only come up in real life use.