A cube I've tinkered with off and on for over 8 years. The draft environment loosely follows Khans of Tarkir's structure but with cards from throughout MTG's history. (very loosely, it didn't happen on purpose, it sortof accidentally crept that way over time) So the archetypes-ish are:

Temur (GRu) - Landfall
Sultai (UBg) - Cheating Fatties into Play
Jeskai (UWr) - Spellslingers
Mardu (RBw) - Sac
Abzan (GWb) - Counters
Artifacts (Each color has 1 or 2 cards that reward you for artifacts-matter, so the artifact deck can be any color)

Much like actual Khans block, only about 60% of the cards explicitly support an archetype, so normal draft decks like UW control and Rb aggro will still work fine. The non-archetype cards have random seed cards and build-arounds that fit the power level I'm aiming for, in case you want to try going against the grain. Approach of the Second Sun is an example.