The best thing about reddit for me was an endless stream of information and news propped up by user discussion. I rarely just scrolled endlessly through posts; I loved delving into comments on posts which didn't even interest me at face value to see what I could learn from niche communities.
It was, hands down, the best, most information dense landscape I've ever seen and frankly I feel a little lost without it. I hope that some day, some where I can find something similar.