Say it ain't so! I've certainly enjoyed the recent discussions you were part of. As Rance01  says, I think everyone gets that feeling at times. Over time, the population shifts, people's interests change etc. Lately it's been rare to find thoughtful discussions about anything other than technophilia and in those rare gems, your voice have been stimulating and very welcome. I hope you take that break and return with new energy and creativity. Good luck. 

“Forever, and forever, farewell, Cassius! If we do meet again, why, we shall smile; If not, why then this parting was well made” 

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken