To my surprise it appears there is no previous thread on this topic.

What's your favorite soft drink served by the airlines (your choices are limited to those listed in the back of the award-winning airline magazine).

Mine (as the profile says) is Spicy Tomato aka Mr. & Mrs. T Bloody Mary Mix with only 80 calories and 8g carbs. Of course, it also has 89% of your recommended intake of sodium (what's good for one person might be bad for another with high blood pressure). Something else I like about Spicy Tomato is that the words are clearly audible to FAs even on a noisy aircraft. Second favorite is club soda.

Least favorite: Fruit flavored drinks with 5% fruit juice, followed closely by sugared sodas.