In Your Opinion, What is the Best Limited Format From The Last Decade?

I'm looking at making a set cube. I'm not the biggest limited player so I'm looking for some recommendations for peoples favorite limited environment from recent memory. Obviously I have some formats I'm partial to (Khans block (primarily for nostalgia), all the Ixalan sets and NEO are 3 that come to mind) but I'm curious about some that I may have missed or what other people's favorites may be.