Seriously who today doesn't feel like screaming some days. Heck Linkin Park seems to scream all the time (all the way to the bank). This one is somewhat of a response to the Finding Yourself comic except with Posey even though this one was actually finished before that one. But this is what Posey does when she's in a funk. She listens to emo music, and tries to draw. I'm sure some artists out there have been in this situation where one of those is more available than the other.
Gotta say that this one is definately more lighthearted about depression than Finding Yourself. Maybe because it's from the outside looking in, both from Gar's perspective.