I put the book down when I read about Fred's death. I threw the book away from me when I read Sirius' death. I threw the book across the room when I read Hedwigs.
However, I do not feel any sort of sadness/sympathy/distress/etc. for Snape. He was annoying, unnecessarily cruel, and for someone who supposedly loved Lily so much, he treats her son - her flesh and blood, the baby boy she loved so much she died to protect him, pretty awfully. Still that could be over looked (who would want to be nice to the person who is a constant reminder to you that your love loves someone else) except even when they went to school together, she comes to his aid after James and Sirius pulled a nasty trick and he calls her a mudblood just because he's embarrassed. Even after he apologizes to Lily, he only apologizes for calling her that, he doesn't apologize for calling anyone else "dirty blood". To me Severus Snape never truly loved anyone, as he could never truly get over himself to do so.
I wasn't upset when Dumbledore died (not that I don't like dumbledore, I just thought it was something that had to happen in the series). I was kind of sad when Sirius died, because he's cool and I felt so bad for Harry when he died. sad I was sad when Dobby died for obvious reasons! crying (he was a free elf!) I was sad when Fred died because HE WAS SO COOL! TT ~~ TT And you can't have just one twin. RIP Fred. (he was better looking then George). I wasn't sad when Snape died even though he was cool. BUT THEN THE FLASHBACKS CAME AND THEN I STARTED FEELING SAD. crying And of course I was sad when Hedwig died. T ~ T
I think that's everyone (correct me if I'm wrong).