I used to have a dozen or so sites that I visited on a regular basis, but I really grew tired of comment sections devolving into "who can post a meme the fastest" competitions. One reason why I keep coming to HN is because of the targeted discussion, and the lack of these types of cheap humor comments or karma grabs.
I find myself looking for more "adult" communities nowadays, and it has been a struggle to find them.
EDIT: Typo