Littlepip: The main character of the most overrated MLP fanfiction ever.
Sorry, but I have never read Fallout:Equestria, and I have no intention of ever reading it. I DESPISE grimdark pony fanfics, and setting pony in a Fallout-type setting makes it grimdark by default. Now, I don't mind pony stories that are simply "dark," but there's a point where I draw the line. Everything I've heard about the fanfic (plus the fact that, well, it's freaking Fallout) makes me suspect that it's on the other side of that line.
And for the record, I DO intend on reading Past Sins (another fanfic that some people feel is overrated) at some point.