So far I've found that the best communities are the ones that have very good categories on the left. Being able to separate your posts like that is great. For

So far I've found that the best communities are the ones that have very good categories on the left. Being able to separate your posts like that is great. For example, check out "3D Printing" in "Makers, hackers, artists & engineers" https://plus.google.com/u/0/communities/112845006884148391862/stream/3d3bc0b9-2686-4c1f-b99f-5f9f4d7f5c00 https://plus.google.com/u/0/communities/11284500688414839186...