Hmm...hardest things about depression...everything?

The way it erodes at my self-esteem is definitely a major part.

How it isolates me from my friends and family, cutting me off from social support when I need it the most.

Cognitive problems (can't remember anything when depressed)

Feeling like I'm dead

And how, even now when I haven't been depressed in months, it still haunts me, and I live in fear of the next episode.