Hi Greg,
For me, it seems to be temporary. I have only been hit with depression for about a year and a half (and had never experienced it before). While I was in the middle of it, I don't remember feeling much of anything. I felt like I was in a sort of stasis, waiting, but waiting for nothing. I also felt hopeless, very sad, and trapped. I think, when I look back on how I felt before the depression, everything was colored with intense negativity. I only remembered the worst. I also remember feeling very numb all the time.
Recently (in the last month), I have been doing much better (thanks to finding the right med). Now I remember the past with a more balanced view. I don't remember being very happy or sad, but I have always been very "even" and not very emotional my whole life, just sort of ok all the time. So my recent memories of the past reflect that.
I think I am more emotional now, since I am feeling better, than I ever was in the past. Maybe it is because I had all my emotions blunted and negatively tainted for the past year. I am so relieved to have them back.
So, I guess my point is: it will most likely be temporary!