There’s a positive “wanting more” mentality and a negative “wanting more” mentality. The negative one is always wanting more in life because you feel you “lack” something, or you need some external validation or thing to fulfill you. This one also is correlated with a lack of gratefulness for what you have, and this person doesn’t appreciate the little things, or the big things, they may have. They’ll never fully be able to enjoy the present moment.