I find others when I am looking for something specific, but have not found any I really want to keep going back to. This is just the same way I find a Ford truck forum when I have a specific problem, but don't stay there all the time.
One of the others you mentioned always goes into pages of name calling and trolling with very little meaningful info or entertainment involved, so I seldom go there except for looking specifically at elk hunting, Savage 99 stuff, or a specific topic. People here are pretty civilized, even when there is a strong disagreement.