Well... the worst thing about leaving Flickr behind actually was that leaving behind a platform rather soon shows the limits of most of these so-called "social networking" sites these days: Networks mainly are limited to the scope of the very platforms, and a lot of "networking" found an end as people left this "one" platform heading for other places just to see that the "network" won't be able to extend to there, as interaction with other "friends" in this "network" suddenly wasn't possible anymore because of the technical limitations of that very "network". From that point of view, there's a "decentralized" approach suddenly growing to be of interest: Simply use a photoblog software (like the one offered by pixelpost.org) and install it somewhere, and sign up with some photolog aggregator like photoblogs.org or [link]. Attract people to your site, same as you are visiting others as you suddenly again have an aggregation of your friends work, even though now they're not living on "the same system" anymore but just in their very different (technical) worlds. So far so good...
... but what to do with communities still of interest, for whichever reasons... like dA? Oh well. No "either-or" decision so far. Try to make the best out of it for as long as it's possible... but try not to get dependent of it that much... Let's wait and see.