I find fizzy pop just much too sweet. As for alcohol, I never drank that much when I did - I was the sort of person who could make half a pint last all night, but I just fell out of the habit really and I don't miss it. Plus both my dad and uncle were alcoholics, and I've seen first hand the effect that drinking to excess has on people's health.
I grew up with fizzy drinks really. My Dad was a lorry driver and amongst other things occasionally made deliveries to a local bottling plant and soft drinks manufacturer. I used to go with him and when I did the people at the warehouse would usually give me crates of soft drinks. On hindsight it is amazing that I am not a diabetic.