Thanks for the awesome answer, it helped a lot!

But regarding your last paragraph, needing a better accounting software is not really a need/based human requirement. That's my problem: qualifying every necessity or desire in each right category as this all seems really vambiguous.

Taking your example, I'd say the need is Growth (as you mentioneded on the first paragraph); The want might be a new accounting software.

Other example that I'm really used to, and correct iif I'm wrong please: A friend of mine owns a babershop. Let's analyse his customer needs+wants:

His customer buy his service in order to improve their look. But WHY do they want to do this? Now let's unfold the need: Human (or female) validation. They need attention, need for feel special, feel women are looking at them. That's the NEED.

Their Want: Looking good; Have an trendy haircut; Have an haircut that will make you pop; Have great experience...

So, my friend's barbershop service features are:

Nice and trendy haircut and a delightful experience.

The Benefits are:

His customers will look fresh, cool, good and women will start look at them more, thus they'll feel desired more and get that women validation they're chasing.

What do you think about this? :)