I'm in the study and the long-term tracking surveys they send us periodically have many questions designed to ferret out different aspects and indicators of happiness and success in different dimensions of life.

I can't imagine how I could be much happier in life.

I have a great, healthy family, great career in a field that allows me to use my brain to create tons of business value for my company, take home an appropriate fraction of that, all for doing things that I'd pretty much happily do for free if I could afford to do so.

I seem to recall reading general summaries of the survey that suggest that we are, on the whole, happier than the average for our respective age groups, but I don't have any of those report summaries handy nor could I readily find them online.