Various characteristics of the networks are examined: their composition, density, homogeneity and dispersion. Their overall structure can be very varied, and therefore builds contrasting environments. Using examples, various personal network profiles are described by analysing the social issues that lie beneath their differences. The study of personal networks, their distribution, their temporal strata, their diversity, and their degree of interconnection, therefore allows us to approach a kind of dynamic social mapping of the modes of circulation and anchoring in social worlds. To better grasp the particularities of personal network analysis, the authors briefly explore a few examples.