When I graduated to daily drinking, I was either drinking a 5th of vodka or 12 tall cans of beer. an extra couple thousand calories I'm sure. I gained 40 pounds within the year and was a bloated mess. Because it was so gradual, I really didn't notice, and since I was drunk most of the time, I didn't really care about my appearance.
Looking back at pictures, I am amazed how I could let my self go like that yet not notice. Maybe it's because I am a guy and was in a serious relationship at the time but I'm still baffled by my lack of self awareness.