Yeah... tempting to come back and not be hailed as incredibly awesome, except I'm afraid I'll always be recognized for what I am - better than most people :)
Communities remain basically the same - the only change is in their fluctuating size, and therefore the volume of their obnoxious little voices. There are the same disgruntled oldbies, though they may now have different names, the same clueless newbies with their same questions and requests, the same emotionally unattached and same hot-blooded developers, the militant moderators, the melodramatic voices of dissent, the weird let's-all-be-friends hippies, all of them. And here's the kick: it's not special to any one community. What happens when you step back from it, Pizik, is that you realize how very unspecial this cycle really is, and how dreadfully boring it is to witness it on a miniature scale over and over again. The people in the cycle think it's awfully exciting, of course, and that they're witnessing something wonderful that must be noted and remembered. Except they're not, and it's not.
This pessimistic spin brought to you by The Association Of People Who Tire Of Other People. :D