I'm gonna throw in my 2 cents on this. I was first very sad when they killed Warrick of the original CSI. I hadn't watched it in a while, and was hearing that someone was gonna die, and had seen him doing some investigating on the side. Then I was watching the end of the show when the double dealing detective guy came up to him as he was leaving the Coffee shop after having dinner/breakfast with the whole gang (Catherine, Brass, Greg, Sara, Gil, Nick) and then the dude starts to leave, then BOOM, u see the glass break and more bullets, and then he slumps over. Then the next episode starts and its chaos, and you see everyone completely torn. I was shocked, and to me CSI has NOT been the same since the death of Warrick, because then Grissom left shortly afterwards, and he was kinda the emotional glue for that group and you RARELY saw him breakdown, but he was very emotional during that, he seemed to consider Warrick like a son and when he found out Warrick had a baby, everything was just amplified even more that made him want to go and work things out with Sara in his strained relationship with her.
This, however I still think CSI is awesome. The Warrick death we kinda knew was coming due to Gary Dourdans drug offence. Still was very sad however and the main cast portrayed that throughout the episode. Really great stuff
The series finale of Angel, where Wesley dies, he dies in the arms of Fred/Illyria who he always had a crush on Fred. It turns out to be the sweet ending he had wanted. Sad way to end the show.
And This. Really great writing in that 5th and final season with the loss of 3 major characters. First Cordellia goes (which sucked because we had grown up with her all through Buffy and Angel but we kinda knew it was going to happen after the end of season 4) but they give her a cool sendoff and it's quite emotional at the end of the episode.
Then Fred dies in a completly WTF moment that I didn't see coming and had fantastic acting from all the main cast especially Alexis Denisof and Amy Acker. Then in the final episode they kill Wesley who went from nerdy guy in Buffy and Angel season 1 to awesome badass. It was very sad