I have cut right back on my soft drink intake from April onwards this year ... mainly because I had a health check up at work that month and the nurse said my cholesterol was edging into the unhealthy region, and my weight was in the overweight category on the BMI.
So I just drank water for a few months and have only had one or two of Pepsis a month since then. Prior to this I was having a 600ml every weekday and often another 355ml can on top of that.
I also stopped bringing my credit and eftpos cards to work so I couldn't buy a dodgy lunch - which I did pretty much every day previously. Instead I bring a sandwich, a couple of pieces of fruit and some raw nuts.
End result, I've gone from 84kgs to 71! Feeling miles better about my body, fitter, more energy, doing a heap more walking ... of course it's not totally down to cutting out soft drinks, but doing that was definitely the catalyst which snowballed into the greatly improved position I'm in now.
Needless to say my BMI is now fine ... I haven't had another cholesterol check, but will do that at some stage and I'm sure it'll be fine as well.
Moral - this thread is awesome, and quit soft drinks!
