I would create a difference, unhappyguy, between "imagine" and "fantasize". To me, imagining involves starting from the base of where I am; where could I go from here? Fantasy is wholly unstructured, has no base, no "rules" in my own world (it has rules, just not ones that I created).

We can always move forward, "grow". That's what good imagining does for us, helps us picture ourselves meeting our goals. Eating certain foods is hardly a goal :-) unless they are healthy foods we would like to learn to eat and enjoy. I learned to like liver and fish by ordering them when I went out to eat since I didn't cook them myself or have them at home.