I would think (this is just a hypothesis, and one on a subjective matter, so it can't graduate to a theory) that it largely depends on how practiced a person is with visualization.
From what I've noticed with myself, is that the more that I meditate (I don't do mind-blanking meditations... they're very sensory filled) the clearer my dreams become. If I practice a visualization technique during the day, I'm quite likely to have a dream centered around another object, like my
anima is practicing the same visualization technique. (There is an article on wikipedia on animas, but I preffer Jeff Lilly's explanation and story more, which is why I linked to his blog.)
It's something to try, no? At the very least, it could be an interesting 30 day experiment.