Providing fun and interesting build-arounds that help to keep the clock moving is one thing, but marrying that up with Commanders that allow the true Control players playstyle to shine through is inspired
Whenever you cast an Instant or a Sorcery, you get to create a 2/2 Blue Drake with flying
Each card also has a Move Cost - that's the cost in Ink you can pay to move a character to that location
Kaalia is has been among MTGs best commander decks for a long time because cheating mana costs is almost always broken, so with Kaalia you want the biggest, baddest creatures of the types you can find, like Avacyn, Angel of Hope or Vilis, Broker of Blood
Caesar hits so many favorites for me: hes inexpensive, hes got a decent power and toughness, and with a little sacrifice, he becomes a problem quickly while doing everything that Soldiers wants to do, make more Soldiers and deal damage
Black I think the highlights in black come as cards that look and feel as if they were always in the old border, even though we know that to be untrue