Aromaticity analyses are performed through the electron density of delocalized bond (EDDB) function, nucleus independent chemical shifts (NICS), anisotropy of induced current density (ACID), as well as current densities and strengths of the integrated current densities calculated perturbatively with the GIMIC program. The EDDB function discloses electron delocalization, and hence, electron density that cannot be attributed exclusively to a particular chemical bond. EDDB reveals that in archetypical Hückel's 4n + 2 aromatics the cyclic (Kekuléan) delocalization predominates and is very effective (82-89% for 6π-systems) while in the case of Hückel's 4n antiaromatics cyclic delocalization almost entirely vanishes although some local resonance effects still remain in their π-systems (see Discussion B in the Supporting Information and Figure for further examples). This clarifies the wide span in the electron delocalization between aromatic and antiaromatic annulenes. As we are aware that electron-sharing and magnetic response properties are not always connected, we follow the common practice of using a set of descriptors to characterize the aromatic character of a given species. It should, however, be noted that we emphasize results on electron delocalization as provided by EDDB.