Been a member of both sites for a while, though admittedly I frequented Gaf more frequently and lurked here. I tried to stay away from political discussions because I noticed they were quick to ban people who had any kind of differing opinion. Hard to have legit discussions that way, IMO.
I mostly posted in Nintendo threads and sales threads so hope the Nintendo and Sales community is good here. I ask that you not stereotype Gaf posters. There were a lot of good posters on Gaf (and a lot of trolls).
That's fine, but this being your first post I guess we can consider you a newcomer, right? So, welcome! And get an avatar, dude, that's pretty important (joking, but maybe not).
I pretty much visit almost exclusively Nintendo discussion here, and have been doing fine for 3 years, so I guess you can say that community is good. Sales discussion I haven't been as involved to know how good it is, generally I only enjoy seeing the numbers themselves rather than debate about them.