Though the thing that brought me to KF was lolcows, I only kept tabs on a handful of them. What kept me there was the non-lolcow stuff. TBH the green forums never really kept my interest for very long, and the signal-to-bullshit ratio was through the roof. Red forums weren't as bad, except A&N which had it's own special kind of resident retards.
I made a lot of posts and started some threads about technology on KF. It's easily half of my 1000 posts there. The blue forums were thriving when I was last active there and easily the part I miss the most about KF. I remember there were a decent number of intelligent and thoughtful people there (blue forums) and not too many shitheads.
A problem KF has is that
@Null bans anyone who thinks for themselves, and those are largely the people who make quality non-lolcow content.
I don't know much about SA but if it's anything like what I miss from KF, then maybe I should join