I'm lazy most of the time -- except for when I'm at work. I'm not very self-disciplined at home. I spend way too much time sitting around on my arse when I get home from work and I'm completely useless on weekends.
The difference between being depressed and being just blah or down for me is this: The things I would usually enjoy doing no longer hold ANY interest for me... and if someone told me I had won $10 million, I wouldn't care. I am incapable of thinking of even ONE thing that would make me happy. I also get constant anxiety and a whole lot of mental chaos and PAIN (it's at its worst when I'm waking up) when I'm depressed.
My doctor thinks I'm mildly depressed right now, but I feel like this is pretty much my normal self. When I'm REALLY depressed, I know it. Maybe my doctor is right and my laziness or my blah mood is depression. If that's the case, though, I've been depressed continuously for about 6 years now.