That's the way to go. Very often if we are asked "What do you want?" we can't give a good answer, whereas "What do you dislike / hate?" almost always gets an instant answer.

In this regard I just succumbed to this brain quirk so I prefer to find 5 things this month that irk me and do my best to remove them from my life, as opposed to meditating hours every day trying to find those 3-4 ultimate things that will instantly make me happy.

Better chase the mouse in your feet than to try and find the elephant beyond the horizon.