Greatest achievement

After pondering the question of what the greatest accomplishment I could possibly achieve is, and after making a mental list of everything that I could possibly want to achieve, I realized that I really just want to achieve happiness. As cliche as that sounds, I believe that accomplishments should really be something to be proud of, something that I can look back on and be happy that I can say that I did that thing, whether it be earning lots of money, marrying the girl of my dreams, saving a baby dolphin, whatever makes me happy or allows me to be happy. I would not cross any legal boundaries in order to achieve this, because those kinds of achievements only grant momentray happinness, for the rest of your life you would be running away from the law or being paranoid of being caught, so that would not bring much pleasure. I don't just want to be happy in the moment of actually accomplishing it, but look back and realize that it wasn't worth much; I want to look back and really appreciate what I had done.