I like the DND feature that mutes everything but rings for repeated calls within a certain time frame - that way if it's something important enough, I can get notified the second time around, otherwise I can toss my phone somewhere and not be bothered until I decide to look at it again.

Same here. I check it a couple of times per day but rarely have it on my person all the time. It's usually on mute or vibrate, and I've set most notifications to hidden/silent except for the ones that matter to me.