Since we are into personal anecdotes: the annoying giant red blinking popup they display all the time to force you to download the app instead of using the mobile website was all I needed to get entirely rid of my habit to visit Reddit, and I like the idea that I might not be the only one.
reddit is not far off from facebook to being a total time suck. i'd like to just be in a couple educational/technical subs or quit entirely but that /r/popular, it just calls out to people.