Coke Zero is good if like drinking the sweeter version of asbestos. Seriously, a lot of diet sodas have aspartame in them. It makes diet worse than regular. A lot fucking worse.
If you look at some newer research, you'll find that the amount of aspartame in sodas is safe for daily consuming. Read the Intake paragraph. (Generally speaking) people are really convinced that aspartame is the work of the devil, but it really isn't. It sucks because this "knowledge" is spread and people will believe it without checking for themselves.
Dr Pepper is one of the greatest inventions of all time and bar none the best soda, and anyone who disagrees is wrong. That's a fact, not an opinion.