Who died that I liked, not including RW:
Ned Stark -
I already said this one
Khal Drogo -
I'll grant you this, but he wasn't around THAT long
Jeor Mormont (mainly cause of the actor playing him) -
I was sad when this happened in the books
Ros -
She's not a book character, she was made up entirely for the show
sorta liked Yoren -
He is a pretty minor character, he does some things, but he's not like, a major character or anything
The bald wizard guy from Qarth (mainly because the story is supposed to be about a world where there is magic and you dont ever fucking see any. Three seasons in and you are just now seeing main characters perform magical acts? Why the slow build up?) -
Pyat Pree/Koolaid mouth? I don't think he's dead, bruh
Arya's sword instructor? What happened to him? -
Syrio Forel is assumed dead. Again, he played a specific part early on, but he was only around for a handful of episodes.
I will freely admit that of that list, there are maybe three that I was actually unhappy about them dying, the rest were just disappointing. However, the fact that I can list that many does sort of help prove my point of "why care about these guys?"
And like I said, the main reason I stopped reading was the books started to become tedious. There is all this build up, and no real release from it. No resolution within that storyline.