I would have to select ForumKorner over HackForums, although I have to admit, I did enjoy my time spent with the hacking community.
Whilst I was a member on HackForums, I have to admit, there was a fair bit of scamming going on. What frustrated me the most would have to have been the members who were ub3r and thought they would hand out negative reputation ratings to members who were a lower rank, only to show dominance. I myself was an ub3r subscriber, until I was suspended for "possibly being compromised".
HackForums does have a lot of members, which means there's a broader amount of sections for various discussions/subjects, and more activity of course. What interested me the most whilst on HackForums would have to have been the graphic-related sections and the gaming-related sections. I sometimes felt as if I was in disagreement with the decisions Omniscient would make - such as the banning on my HackForums account for the reason: "Possibly compromised".
Another thing which would frustrate me about HackForums would be the idiots who spend a large majority of their time online to post within the 'Lounge'. Sometimes the 'Lounge' is filled with plentiful discussions, and interesting topics, but a majority of the time it's just full of bronies and trolls. A prime example of a 'Lounge-idiot' would have to be the member "Automatic Coding" - I never liked his attitude towards the forum.
I despise the members on HackForums who kiss Omniscient's ass. Yet again.. a prime example of an 'ass-kisser' would have to be the member named "Grumpy". On numerous occasions, Grumpy was suspended for trolling and acting low-quality on the forums. Omniscient continued to revoke his suspension every time, but Grumpy just kept getting himself banned. What frustrates me the most is the fact that members such as 'Grumpy' can have their suspensions revoked, but I was permanently suspended for a misunderstanding, and my suspension wasn't justified.
My conclusion would be that ForumKorner is more of a friendly community; similar to a large family. Although members can have their ups & downs, we're still able to enjoy active and thorough discussions.