All of the above, especially NMR, WAH, and Grave. (And I read Seth had great hair in the dream...😛)
And also:
End of Becoming Part 2 (the song always gets me as she's leaving)
tiny bit of Amends
Help - when Cassie explains why she doesn't want to die to Buffy and Xander
End of The Killer In Me (I think I cry every single time Willow cries.)
I don't know why, but I cried at the end of Never Kill a Boy on the First Date when Giles and Buffy are talking.