My favorite is Baja Blast Mountain Dew. They only sell it in the stores for a couple of weeks out of the year and I'll stock up on it to make sure that I have enough to last me a whole year until they sell it again. I end up buying about 4 or 5 cases of it each year. I don't drink but one once in a while since I have to make it last me a whole year.
When it comes to soda I usually either go for Pepsi, Coca Cola or 7UP. On hot summer days when the temperature is really high and we have a lot of humidity 7UP is always my go to. I find 7UP to be really refreshing especially on a hot day and it just hits the spot on those days when I want something other than water or tea.
My favorite soda has to be a Norwegian brand called Villa which tastes of an assortment of fruits. It is generally my go to soda, unless I want something tropical. In which case I go for Tropical Fanta (pink/red).