I will get 'Atypical Depression'. In addition to melancholy, I experience:

. Sleeping too much (14hrs+ a day)
. significant Increased appetite or weight gain (5% body mass monthly)
. Having a more intense reaction or increased sensitivity to rejection, resulting in problems with social and work relationships (performance anxiety)
. Having a stron physical feeling of being weighed down, paralyzed, or "leaden"

A big difference is that an person with Atypical Depession is 'mood-reactive'. This means their mood will react accordingly to positive or negative stimuli. A person with melancholic Depression is less likely to react to positivity.