I miss some communities here that are present on Reddit. But you're right, here you can feel yourself more free and more engaged. With some time and some effort, this can be very awesome.
There are funny ones, like 2westerneurope4u and balkans_irl; useful ones in general, like astralprojection and meditation, an useful ones in my case, like stratterarx and aspergers. I also miss polandball, but to reach that quality level it's needed a lot of time and more users.