Before being diabetic, my favorites were ;
1. Nesbits Cream Soda
2. A & W Cream Soda
3. A & W Root Beer
4. Welch's Strawberry Soda
5. 7-UP
6. Orange Crush
7.

can't remember the name, but it has grapefruit oils in it
After diabetic diagnosis;
1. Wal Mart's - Clearly American - any flavor
2. Diet Cream Soda
3. Diet Root Bear
4. I make a bunch of my own soda flavors by mixing together sparkling water, Splenda, and various flavor extracts, especially vanilla as I do love my cream soda and it's very hard to find without sugar or corn syrup.
Seeeeeeeya; Goodweed of the North