Lidgar
Gongfarmer
I have to say I'm surprised that the Magic System hasn't garnered more love; in my estimation, the new magic system in conjunction with the bounded accuracy (which in my mind the proficiency bonus is a component of) are the two things most responsible for reigning in the power acceleration to levels we haven't seen since 1e days. I also didn't see the advantage system as being super important to 5e's awesomeness, but it has a lot of love here I can see - good deal.
Right there with you Henry. The magic system, coupled with bounded accuracy and the rules light approach, seals the deal.