1. The document discusses three different "flavors" or perspectives on personal learning environments (PLEs) based on influences from different academic disciplines: educators and psychologists, technologists, and community facilitators. 2. Each discipline focuses on different aspects of PLEs - educators and psychologists focus on topics like personalization and self-regulated learning, technologists focus on interoperability and recommenders, and community facilitators focus on community building and sharing practices. 3. The document proposes a model to characterize PLE developments according to the dominant influences and features from each disciplinary perspective, and provides an example PLE solution to demonstrate this model.