One of my goals I keep shamefully revisiting every time I consider self improvement, or for a fun idea of a "new year's resolution" is to quit the diet soda drinking habit. Been drinking diet soda all my life since I was a kid. Multiple liters every day. Most days I won't even drink water, just diet soda until it's time to brush teeth and sleep. Usually some coffee too though in the morning, and to keep me up later in the work day or something.

For those who quit soda / diet soda, have you noticed any changes? Perhaps a better diet as a result, less bloat, whiter teeth, lower blood pressure + heart rate?