How do i express my happiness in Chinese?

How do I express my happiness in Chinese?
幸福/快樂/幸福快樂.
Pinyin: xing fu / kuai le / xing fu kuai le　　
In verbal language, “幸福” is enough to describe happiness.
In writing, “幸福快樂/幸福快乐” is considered better than just “幸福”.
“滿足” is a humble way to say you’re satisfied with what you’ve. And like before, you can add “快樂” behind “滿足”.
In writing, the former (幸福快樂), is still much commonly used than “滿足快樂/很滿足快樂”.
Pinyin: man zu kuai le / hen man zu kuai le
In verbal language, “很滿足快樂/很满足快乐”is suitable and humble enough to describe happiness.
Any way in writing, “幸福快樂”is still a traditional way to describe happiness.