About 60 hours.
Made a huge playlist of nothing but instrumental hip-hop and vaporwave (by that I mean I just listed them as the same genre) and had it play as a playlist. Took 3 days to listen to all of it (obviously) and it was pretty cool. Used to do it often, but ehh.
MPGH Member - 12/2012
RotMG Wiki Editor - 05/2014
Donator - 03/2015 (thanks Cursed!)
News Force (User News) - 10/2015
News Force (Section of the Week) - 03/2016
News Force Editor - 08/2016
Official Middleman - 09/2016