people whom i know personally are not always happy but when i meet someone , just hi hello, i feel they are really happy in there life. for example i met a family some time back and thought they were a perfect couple with 2 little kids but later i came to know they have so many differences and they actually sleep on different beds.
as far as i think my parents are the most happy people i know.
My father is peacefully retired, mother is busy with social work, both their daughters are well settled and the best thing about them is that they dont compare themselves with others so they are always satisfied in life.
i guess being able 2 have a peaceful sleep at night without tension and worries is what makes you happy.