One of the main distinctions between products and services, is that we use the latter rather than own them. Part of good service design is to encourage use over ownership.
One reason why people become passionate about products is that they can make them their own, they can show them to their friends, they can define themselves by owning them. This strong feeling of ownership cannot and should not be underestimated when designing services. Creating a feeling of ownership could help users become passionate about using a service in the same way as owning a product. This can be achieved by designing compelling touchpoint experiences, or where possible, allowing users to own part of the service.
Take voicemail on mobile phones for example. As a service, voicemail is not owned by the users but rater used: every time a user wants to access their voicemail they have to call into their voicemail service to access and 'use' their voicemail. My experience in researching voicemail suggests that users feel let down by the service because they cannot own it. Simply using it seems like a cheat. So, any way of allowing people to 'own' their voicemail will improve their experience and the service.