what I was taught is that cravings are either your body influencing you to ingest something that contains a substance that you need, or an addiction. In either case, Dr.Pepper :p
Ahhh... I had (briefly, occassionally, and never enough to bother finding out the answer) wondered what root beer was -- I presume it's primarily a US thing, as I've rarely seen it in the UK. I'd assumed it was akin to ginger beer rather than to ginger ale.
Personally, tonic water -- lots of tonic water. No malaria for me!
nothing but coffee for me, I have sworn off all sugars, lost 185 pounds in 1 year. No more sugars or carbs, changed my life, i haven't felt this good in 20 years.