My wife and I were just having a conversation about this a while ago. I have to say that I am nearly 100% content. Okay, probably not close to 100%, but although there are things that I wish differently for my life, I can't really complain about the life I have. I live in a nice house in a nice neighborhood, two nice vehicles, a nice travel trailer, and all the love from family and friends that I need. That's pretty good in my opinion!
It sounds pretty legit to me and I'm not surprised you say it as you've worked hard for it as far as I can tell.
I don't think there's anything wrong with being content, it also doesn't mean one doesn't seek more, new experiences and such, just that one is satisfied and I think that's a good way to be.