I used to love fizzy drinks, but I stopped having them because they are so bad for you. The one soft drink I still do have is ginger beer, which is Sainsbury's super market brand, but I also like the brand called Old Fiery Jamaican, and my mum is very fond of Crabbe's ginger beer.
As for the 'proper' soft drink brands, out of the ones I used to drink, Sprite and 7-Up were definitely my favourite. My dad on the other hand loves Fanta Lemon.