People liken go to a language. In fact, one of the metaphorical names of go is “hand talk”. Viewed this way, a game of go is like a heated, lively debate. Moves function as argument and counter-argument.
Children learn language by observing how others talk and interact. They first start by muttering gibberish, unintelligible, voice, but soon become proficient in it.
No wonder, playing over pro games is one of the recommended activities to improve at go. It is just like a baby listening others talk. Unconciously, you will make good moves naturally.
Currently I have the first 50 moves of 2 pro games on my memory. They are Kato Masao (W) vs. Otake Hideo (B) (1976, 5.5 komi, W+1.5) and Yamashita Keigo (W) vs. Cho Chikun (B) (2004, 6.5 komi, B+2.5). I memorize only the first 50 moves because I want to become more proficient at the opening. Opening is one of the most mystical parts of the game for me.
Another game that I’m going to memorize is Kobayashi Izumi vs. Umezawa Yukari. A girl fight, but a really fierce one… I’m also planning to memorize pro high handicap games since I usually play those types of games on YIC.