For me, the main unpleasantness of reddit lies in the amount of pun threads that show up in the comments on any story. It may have been funny at first, but it just makes it harder and harder to find the actual interesting comments.

however, judging by the number of upvotes they all receive, there's probably hundreds of thousands of people out there who disagree with me, but seriously, a lot of comments on there are like i can haz cheezburger without the cutesy grammer.