I was on vacation from work this week, so I had a lot of free time. I ended up watching a lot of Mahjong videos on YouTube.
Among those, I watched several videos from the guy who played with Northernlion, yu_song. After having watched ないおトン so much, going to watching a middling player was quite interesting. The difference in play was immediately obvious. And as my goal is above yu_song's level, knowing where those differences lie is valuable. Watching critically with the mentality of, "I must surpass this person."