The Girls und Panzer final episode, the Doraemon final episode, actually, the final episode of a lot of anime I like or have liked at some point.

EDIT: Also, Windows Vista and the first version of XP. 7 is what Vista could've been if done right. XP got really good after a couple service packs.

(ME wasn't rushed, it was straight up shit. "Millenium Edition" more like "MISTAKE Edition")