I think of the market as a giant puzzle.
Nothing really comes close to trying to "figure out" the ES.
Barring that, if you have real live people that will play games with you, head over to boardgamegeek.com and soak up the thousands of games most people have never heard of. Some of my current favorites are Agricola, Ingenious, Hive, Hammer of the Scots and Imperial. A lot of these are also playable for free online against human opponents if you can't get people together.
Nothing wrong with the classics like Go and Chess either.
After spending time with the market and playing against human intelligence, playing against an AI in a puzzle or strategy game I usually find pretty boring.