second objective? Emotional objective

I was reading Emotional Design by Don Normal and was quite moved by some of the "user experiences" he has shared about objects which some feel pride in using. This makes me think about UIs; emotional appeal is indeed important for making a product "long lasting". Should "emotional appeal" be considered "strongly" like we consider "tasks"? I guess yes.

During designing I take up an objective which helps me be on track. My small trick is to frame an objective in a single sentence. My observation is if you are clear about your product/problem you will be able to frame it in a single sentence.

So all my projects have a "objective". All of these were related to Tasks or logic related. say like, "building a product which help users FIND and SHARE <certain> information." This makes design decisions easy for interaction designers. But what about - Visuals or content? I guess here is where the emotional design will fill in.
Build an emotional objective - say like "to make the user smile every time he visits (or interact etc) this product". This is very good way to think about visuals and content (including error messages). This could keep an emotional punch in your product.
So while interaction, information, usability can keep the product simple and usable; this can keep the product "engaging and fun to use". Have 2 objective one task related one emotions related. What do you say?

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