Why is diet pepsi so amazing?

Seriously, my entire life I have been unhappy except for days where I have had access to diet pepsi. It is the most amazing consumable object on earth. The first sip immediately jolts your tastebuds/throat with a peppery refreshing sensation. When you drink a lot and then soda burp and it goes up and through your nose, it makes parts of your brain all tingly. Also it gives you energy with the caffeine and wakes you up better than coffee. Any high off of any drug doesn't feel as clean and comfortable as diet pepsi. Also, it has zero calories. I drink 4-8 litres per day for my health. But what are the components of this amazing tonic that make it so amazing and life-changing?