Archive Panic - Helped not at all by the launch of the Archives series.
Author's Saving Throw - Freedom was this for his erratic output in The Eighties, as well as his endorsement of Ronald Reagan at the time. Freedom included several vitriolic attacks on the effects of Reagan's policies (as well as those of his successor, George H. W. Bush).
Crowning Music of Awesome - Frequently cited candidates include Harvest, Rust Never Sleeps, Tonight's the Night, On the Beach and Freedom.
"Long May You Run". It was even the closing song for the 2010 Winter Olympics!
Epic Riff - "Cinnamon Girl", "Like A Hurricane", "Mr Soul", "Hey Hey My My", "Last Dance".
Face of the Band - Young and Stills were both in Buffalo Springfield. Dare you to name another member.
Jim Messina (of later Loggins & Messina fame). There was also Ritchie Furay and some other guy, but the point I was making was that there's a third member (Messina) who is pretty well known on his own.
It is actually possible to play "Six Degrees of Neil Young".
They Changed It, Now It Sucks - Trans. So far as to make his record company sue him for not sounding like he used to sound.
It went farther than that, despite him being known as a country folkie, they refused to release "Old Ways" after that since it wasn't his rock sound, insisting that he do a rock album instead which resulted in the rockabilly "Everybody's Rockin" (definitely a Take That). The "Old Ways" that did get released isn't the original, by the way. It was after those albums that Geffen decided to sue him.
Oh, and while "Trans" IS different on a lot of songs, Young didn't completely abandon country-rock. Listen to the song "Little Thing Called Love", it sounds like it could easily fit on almost any other album he ever recorded.