I've tried 500px, I've tried Flickr. But well - typical responses are "Awesome! If you have some time have a look at my pics."
(500px) or "." = zero interaction (Flickr).
But I didn't get, what I was looking for: Constructive criticism to help me get better. Even you folks here on G+ are way to nice, even if I add the #critiquepls
Finally I may have found the site, I was looking for: +1x.com
- it's very focused around interacting with each other. At first it appears similar to 500px. However 1px adds communities, forums, weekly theme challenges, a great curating system and you can level up and get more influence over time.
But what's more important to me: You can submit your work for critique and you get great responses here. All you have to do is to post your own critiques to 3 other submissions before you can post one of yours for critique.
My 1x profile can be found at http://1x.com/member/yaba/
and if you would like to see some example critique I've received look at this picture (http://1x.com/photo/512222/all:user:501219
) and click on the critique button on the lower right. Or have a look at all pictures that are currently posted for critique: http://1x.com/critique
1x still has some quirks. If something is not working, try reloading the page and occasionally you'll find some layout problems. But give it a try.
And for my fellow plussers here: Don't worry - I do not plan to abandon Google+ now. I will still post all of my work here and just a subset of my work to 1x just as I did with 500px and Flickr in the past.