1. A method implemented at least in part by a data processing system, the method for configuring a particular user's user-interface to a virtual world implemented by the data processing system, the user having an associated avatar in the virtual world, and the method comprising the steps of: identifying behavioral characteristics of the user, the behavioral characteristics indicating how the user controls the avatar in the virtual world; configuring image-capture-or-sharing tools, avatar-appearance-editing tools, or both in the user-interface based at least upon an analysis of the behavioral characteristics of the user; and storing information pertaining to results of the configuring step in a processor-accessible memory system.