Most Missed Dead Character
I'd have to say it is Fred Weasley. I think about how long George will go without his twin and that is a far greater time than he actually got to spend with his twin.
I love the Weasley twins. They are funny, creative, and brave. They are great characters. I love the Weasleys and the twins are no exception. They have some of the best lines in the series (along with their brother, Ron).
I know Sirius Black and Albus Dumbledore are bigger characters, but the death that hit me the hardest was Fred's. He was just a boy. Yes, he was 20, but he was still just a boy. He was a brave boy. He fought until the last.