In no particular ordering:
Dima Ovtcharov winning bronze in the table tennis singles. Great matches against Zhang Jike and that Taiwanese guy.
The fencing bout Japan v Germany in the men's team epée. Especially the final round between Ōta and Kleibrink. Controversial decision after judging the video, but still nail-biting.
The pole vault final — both Holzdeppe and Otto surpassing 5,91m right after another — Holzdeppe for the first time! And then Lavillenie besting them in his last attempt. This guy is legendary!
Men's football: Japan v Spain 1-0. Nuff said :)
Rūta Meilutytė winning the 100m breaststroke.
Marcel Nguyen on the parallel bars.
Andy Murray beating Federer in the tennis final. He played the match of his life.
The opening ceremony: "Jerusalem", "Abide with me", the torch lighting, …
Jessica Ennis winning the heptathlon.
Bradley Wiggins getting first and Tony Martin getting second in the cycling time trials. Wiggo, you're the man!
London and GB really showing their best side as hosts. My Anglophile sense is tickling!
Still don't know about the closing ceremony. Liked the Kate Bush though :)
Next thing coming up: TOKYO 2020 頑張ろう!