The Atlantic attempts to explain how Reddit's Ask Me Anything became a "mainstream delight." [Previously]. [Even more previously]. [Even more previously than that]. [more inside]
Giancarlo Esposito, the actor currently known best as Gus Fring on Breaking Bad (and, of course, the veteran of many, many other roles), is doing an AMA on Reddit, and responding to some of the questions via his YouTube channel. [Presumably, spoilers for BB ahead.] He also explains this.