Time could prove you right about the subcategories. Maybe they are all together the wrong approach. Or maybe they are a stepping stone. My long term goal is to identify the pattern of post-purchase emotions you talk about, and use that data to inform future purchases.
But currently having a single bucket for all wants is creating friction and unease. In the single bucket, the chapstick I want to sooth my cracked and bleeding lips is equally on par with a new book. Mentally moving the chapstick to a different category of want makes me feel free within a framework, instead of constrained by the framework. If that freedom turns out to be false excitement, then I can iterate as necessary.