It's normal to always want more.
Myself and my wife have taken a new look on life in the last couple of years. Before we were obsessed with money, we bought a house and saved like crazy. But we were not happy. So we sold the house, I became self employed so I could work as little or as much as I like. My wife is still in her job as she likes it. I got rid of my new car (08 plate honda at the time) and bought a 10 year old IS200 to free up more funds.
So we now enjoy life, we take 6-8 holidays abroad per year, I bought an IS300 as I'd always wanted one lol, she buys shoes, handbags etc and we live with the philosophy that as long as we have a roof over our head and food in our cupboards/fridge then we are blessed and life is good :)