Needs are a window into your soul. Everything a person does or says is an attempt to meet a need. They’re never doing it to piss you off. Even if they're tragic strategies that motivate others to not meet their needs, folks are always doing something with the goal of reflecting their values.
You don’t need the word need. You need that energy where you recognize that this is a thing everyone agrees makes life more wonderful. Call it something else, if you like.
In my Nonviolent Communication world, I can define a need as "a universal quality which, when experienced, enriches life."
A need can be as urgent as air, or as delayable as sexual expression. Both are needs. Also,things like community, excitement, purpose, relaxation, inspiration, belonging, honesty, trust, liberty and order are needs. Everybody has them to different degrees (you bet my roommate's need for order is less pressing than mine, but he has one. Mine is just more central to my being, more core), and everybody can delay them a little. When they're missing from our lives for too long, things get yucky.
I think of wants as the strategies I use to meet my needs. So, like, I need stimulation, but I want the thing that stimulates me. Say, a new book. I don't need a new book, but the book is a strategy for getting my need for stimulation met.
I don't want to go to church, but that would meet my need for community. Instead of doing something I don't want to do to meet that need, I do something I do want, like go scuba diving and chatting with all the other divers on the seashore.
I think the kicker is to be uncompromising about your needs (I need food, and there's no denying it), but flexible about the strategies you use to meet the need (peaches, spaghetti, tuna, salad, burritos, or sushi. Or all of them!).