I replied to him with the filled questionnaire after a week only because I really had to think about this question. I know what makes me laugh, what makes me smile, what delights me, what excites me but I believe happiness is something beyond all this, something grander.
The answer was so simple, being at home makes me happy! But then what if I didn't have a home. Would/Should that take away my happiness? Now a days I live away from home, does that mean I am not or can't be happy? This argument was good enough to compel me to think a little more.
If he had asked me this question few years ago I would probably had said, "dude, if Microsoft hires me I'd be really happy!" Microsoft didn't hire me, so can I never be happy?!
My definition of happiness has been changing over the years but after reading his question, I had to find a way to at least convince myself that there are some things in life that are or which can provide perennial source of happiness. Instead of specific reasons I started searching for general reasons, common things that happen in life. And then it struck me... I always like when someone comes and talks to me, I always enjoy sharing my ideas or opinions with others, I really feel connected with the other person during the face to face conversation. So I replied, "A good conversation". Most of my conversations have been good.
What makes you feel happy?!