Obuun, Mul Daya Ancestor has made less of an impact, as there are generally more interesting and powerful commanders in their colors
Dig Through Times instant-speed nature plays really nicely with Wilderness Reclamation and means you dont even need that big a discount on the card to cast it, whilst Censor serves the dual role here of either interacting early or cycling later to fuel your next Dig
The enemy colours, such as Orzhov (black/white) or Izzet (blue/red) don't have their own Battle Lands
Garruks Uprising Garruks Uprising sees a lot of play in Commander, and for good reason
It was actually protecting my graveyard from Deathrite Shaman that really sold me, even though its a pretty big corner case where that will matter
Some include a physical or vocal component, like Blacker Lotus or the Gotcha! mechanic on Touch and Go, some have rules that specifically reference flavor text or artists, like Carnivorous Death-Parrot and Drawn Together, and some require interacting with people or objects outside the game (Ashnod's Coupon being my favorite)