Is Contentment a Bad Thing?

I watched an episode of The Simpsons the other day entitled "The Ice Cream of Margie (With the Light Blue Hair)." In this episode, Marge realizes (after watching a talk show) that she hasn't left much of a legacy in her lifetime except her being a housewife. So, she desperately searched for her legacy only to realize later that she already have one all along, a legacy with her family.

Is contentment a bad thing? It's not that people would settle for just anything, it's just that sometimes people think that they already have everything they need (atleast I'd like to think so).. a goal in life.. somewhere to belong.. somebody to love - (hmmm..sounds familiar). Are we suppose to want more than what we want?