It's sometimes strange to see people really happy when one met them or knew them for a long time as being glum or something else less than happy. I saw some of this very recently which reminded me of seeing it on a larger scale with some friends of mine who are getting married, in happy relationships, or having disposed of very bad jobs that got them down for a long time. Interesting: That these changes happen at such different rate for different people - strength of personality as inertia? Growth rate of trust in something new? Seeds are sometimes amazing.