I was super annoyed when I joined reddit only to have to take on the chore of unsubbing every single "default" sub so that I could populate my feed with what I actually wanted to read about instead. Maybe I'm Spiders Georg, but I really don't like it when a website tries to decide for me what I want to partake in. It's better to start with a clean slate you can manage yourself -- then you learn how to explore the site, how to use the site, how to engage in the site, at your own pace. When the site tries to force your engagement, it makes it more difficult to learn how to use the site (in my experience, anyway). :V