USER INTEREST TAGGING

Techniques and systems may be used to generate a list of interests of a user that interacts with a catalog of items, such as by purchasing the items from a host. The host may then generate a list of interests of the user using a taxonomy that is mapped to the catalog of items and the user interaction with the items. By generating the list of interests based on user interaction with the catalog, the list of interests may be generated based on factual data rather than user opinion. However, in some instances, the user may additionally provide a self-rating for an interest that is identified by the host. In various aspects, the list of interests may be associated with a reviewer of items of the catalog. In some aspects, a reader may identify reviewers that have similar interests by comparing reviewers' interests to the reader's interests.