The good and the bad (as perceived by us) should be viewed neutrally. When depresed (from what i have experienced) everything would look negative even the ones that normally brings you happiness or excitement. (And the depression you seem to be descrbing would resultnexactly in that.)
Vipassana (kayanupassana which i like the most) views one's body as one:walks, talks, eats, thinks, watches etc (basically keep repeating to oneself what one is doing: walking walking walking, standing standing etc) would result in one NOTICING ONE'S THOUGHTS, FEELINGS, EMOTIONS (finally personality) more. Will that be a good idea if one is depressed???