I have successfully not liked sugar, candy, sweets, sodas, etc. for many years. I did this by noticing and then focusing on the cruddy sugar drop feeling one experiences after eating something like a large portion of ice cream. After a while you train yourself to feel revulsion when you see ice cream (or whatever). I actually sort of regret doing this, but not entirely, because then I look around at how hard other people have to struggle against these super stimulus foods.