What is it that makes me happy?
Since I am a kind of "giggler" or "laugher" people perceive that I am happy, and so they have asked this same question, and I have answered this question orally many times throughout my life.
There is something to be said for "nature". That's what people have said to me in the past. It is easy to let that be the end of it and stop thinking about it. However, it is true that I have a happy nature, I also have a dramatic nature and a sense of tragedy and ominous clouds floating over me.
So, whenever you talk about nature, you must deal with the complexity of nature and life itself. When you point at someone and declare that they are happy by nature, you must also admit that that smile may have been constructed over night in the face of grim personal issues, or bad news multiplied with other bad news.
This leads me naturally to my answer. You begin with a determination to be happy, because you know how wonderful it makes you feel. With your strong determination, you accept all that life has given to you and bestowed upon you. Many miserable people spend their lives bemoaning existence all the time.
Once you have accepted what is yours, you organize yourself with a positive framework for dealing with the good, the bad, the in between. Amazingly, it is not always the good that brings pure happiness. The bad often has seeds of happiness within. The inbetween is loaded with opportunities. Happiness is therefore a creative act. It is not bequeathed from angelic sources, or special DNA. It is a beautiful act of daily divine effort that works with Providence and your special personal hope.