Over the next few decades we will face enormous challenges as a species, and there are lots of resources to inspire you what to dedicate your efforts towards. 8

Over the next few decades we will face enormous challenges as a species, and there are lots of resources to inspire you what to dedicate your efforts towards. 80000hours.org is a good start; it has lots of links to other pages. Ambition is orthogonal to greed and vanity. I do personally relate to your question. I catch myself thinking of myself as modest and content, when really I'm often just complacent. I have found that silence (i.e. literally turning off the music) has helped me become somewhat more alert to the unfulfilled parts of my life.