Every single one (it should be easier to ask for the episodes we didn't like, there would be less to count)
the whole season 2 (except the 13th because I can't stand Justin Bieber)
Original song, the first time... all that.
(By the way, don't you guys think Glee is starting to change and it's a bit wierd now, like it's not like it used to be and I hope it's temporary... and I know there should be a question mark right now but I think it would make my statement look odd)
Klaine (so perfect... so handsome... don't touch my klaine and back off Karofsky! Kurtofsky is great as a friendship relationship but it's weirdly handled. And I used to dislike Sebastian but now I love him... such a bitch. He was fun trying to steal Blaine I want him to try again just so that Klaine gets spicy ang bounces (I like that word "bounce") and grows even closer)