4. The Picard scenes in the TNG episode "Family." You see the human pain behind the assimilation. A great Patrick Stewart episode.
In contrast, watch the end of Voyager: Unimatrix Zero. Janeway in sickbay, joking around after having been assimilated and had her body raped with implants. "Oh, the doctor still has to remove the stuff from my spinal column, and it's very painful, hahaha."