Ive been actually severely depressed for the majority of my life and I think that caused A LOT of the introverted tendencies. I'm actually getting better and feeling more alive than I've ever felt. I'm not implying that introverts are depressed, etc...but when you were as depressed as I was, you tend to isolate a lot and generally hate everyone and have no energy to accomplish much of anything. That veil seems to be lifting a little more, bit by bit and I feel more like my "true" self now than I ever have. Depression clouds a whole hell of a lot.