Since the moderator community here is quite large, I figure we would have quite alot of interesting perspectives over here in Tildes. Feel free to chip in even if you're not a moderator, or god forbid, moderate such subs as T_D. Having a range of perspectives is, as always, the most valuable aspect of any discussion.
Here are some baseline questions to get you started:-
Did your subreddit take strict measures to maintain quality ala r/AskHistorians, or was it a karmic free-for-all like r/aww?
Do you think the model was an appropriate fit for your sub? Was it successful?
What were the challenges faced in trying to maintain a certain quality standard (or not maintaining one at all)?
Will any of the lessons learnt on Reddit be applicable here in Tildes?