Console and individual game ones mostly, also my local subreddit (japanlife). I'm sure I'll learn to live without them eventually, but I'm just so used to that structure that it's going to be hard at first...

The thing I will miss the most though is how RiF allows me to instantly jump to a subreddit just by typing a part of its name, no need to subscribe or anything. This is how I've been browsing for years, so having everything combined together is hard to get used to. I'll manage in time, hopefully.