But then again you didn't really specify anything outside of "Reddit, but rules that make sense"
I guess what I miss most about Reddit is having one place with so many different communities dedicated to a particular topic, ideal, or hobby. I could always find an article or discussion that caught my interest on any given day. Hubski does seem to have the potential for that, though it still has relatively few topics and still fewer which are updated regularly. I know I can do more to help with the last part and plan to post more here in the future. I guess I could create new tags, too but I want to see more activity on current subjects first.
Also, there are the "gone wild" and similar subs. I never posted to those, and rarely commented on them, and I know I can still look at them as much as before but I'd prefer not to give Reddit the page hits. I know there are plenty of other similar pictures easily found in any image search and I'm just about as likely to meet any of those women IRL as any of the "gone wild" girls, so I guess it's not a real loss, except in some intangible way that I can't explain.