Yeah, when it first hit me that I may actually fall into the "depression" category there was a slight relief. It meant I'm one of the unlucky millions who suffer it, am not alone and I can, somehow, be "fixed".
Just recently, though, I've realised it's more than that. Whether I'm "depressed" or not, I genuinely - at the risk of sounding enormously clichéd - cannot remember the last time I considered myself happy, in any sense but the extremely short-term.