While this subreddit does dip into screenshots---and screenshots are technically pictures---most of the screenshots on r/iamverysmart are usually of text. As such, we think it should make the list.
As a forum devoted to making fun of online posts from people who think they are "very smart," r/iamverysmart is one of several massive subreddits that cover the huge levels of ego that you can find on the web.
These posts range from people preening about their IQ scores in ironic ways, to "not-so-humble-brags." It seems that everyone wants to shout from the rooftops that they are better than everyone else in the room, and often, it comes back to bite them.
With over 1 million members, this subreddit is definitely updated frequently. Although it's not a blog in the technical sense, it can definitely fall under the category of "fun blogs to read when you're bored."