This article is from the Depression FAQ, by Cynthia Frazier with numerous contributions by others.
The most common description of the effects of antidepressants is that of feeling the depression gradually lift, and for the person to feel normal again. People who have responded to antidepressants are not euphoric. They are not unfeeling automatons. The are still able to feel sad when bad things happen, and they are able to feel very happy in response to happy events. The sadness they feel with disappointments is not depression, but is the sadness anyone feels when disappointed or when having experienced a loss. Antidepressants do not bring about happiness, they just relieve depression. Happiness is not something that can be had from a pill.