Always wanting more - after 3 hours tennis at PG

Played three hours of Tennis.  Moderately happy but not contented as before. Only a few weeks ago, I was estatic that I can play tennis again after shoulder and knee injury stopped me for over 18 months. Just hitting a few fast ball was enough to lift my spirit.  But after a few weeks of playing, I felt bored already.  People met in Meetup.com was nice and pleasent but they can hardly play.   It is obvious that few of them formally learn the game.  I have to tune down my game quite a bit so not to embarress anyone.   But it bored me, even I appreciate the exercise and social contact. 

I miss my grad student days and my days playing at Cupertino.  Over there, my winning was never assured so each game become more meaningful.  Sigh, can't have everything.