The Architect: Building Systems. Architects want to fit all their information into an all-encompassing "ultimate system" with a clear hierarchy.
The Gardener: Cultivating. Think in a bottom-up way, cultivating many kinds of ideas and possibilities at the same time.
The Librarian: Researching for Projects. Librarians value books and ideas for their own sake but also seeking to organize information for specific purposes.
The Student: Acquiring Knowledge. The Student is the most common kind of notetaker.