I don't think this is important. Everyone has his own way of life. It is enough to live happily. There is no need to compare with others. Life is your own and you should pay more attention to your own life experience.
happiness is depend on how we look at this and how we want this to be.There are people that has simple outlook about happiness and while there is others that has so hard to please.
Self-discipline. The reason is simple. Self-disciplined people can control their life and work well and are often better than ordinary people.
That's it , our contentment is the most important thing. 
