For the sake of argument... I'll play the devil's advocate here. I left Dribbble for nearly a year, and since "returning" so to speak my postings have been slim. It's often one of the things that come up with clients or during interviews... Being asked why I'm not active on one of the most prominent designer networks out there. They see such amazing work being posted and all the positive feedback as a great thing, without often realizing many of us joined Dribbble to grow our skills and learn from the constructive criticism often found there at the time.

As Dribbble has aged and it's user base has grown, it's experienced the same bloat all networks do. The initial user base that was nothing but the most interested designers has grown to include the lurkers only seeking inspiration, and even clients/employers themselves. It's not a bad thing the network has grown, just something many people don't understand or particularly enjoy.

That all being said... It's all about who you follow and interact with on there. Twitter and Facebook can easily be social networks that are more annoying than useful if you follow awful people. I've found that interacting with and following the right people on Dribbble can drastically change it's usefulness. The small network we used to enjoy years ago is gone, but that doesn't mean there should be a mass exodus.