George RR Martin still has my attention. Robert Jordan, on the other hand, managed to alienate me from Wheel of Time long before he passed away. Seriously, book ten was about as close as you can come to insulting your readers without actually coding the words "you people will buy anything, won't you" into every page.
Still haven't played Mass Effect 3, but that's EA's fault. Even with all the derision heaped on the ending, I'd still give it a go for the many good parts others have described; I just can't vote for EA to keep doing what it's been doing with my wallet. Maybe some day it will come to GOG.
GTA IV- there could hardly be a worse game for getting part-way through and restarting. Every time some other game lures me away, it's harder to come back. Just too damn much busy-work to get through the sad-sack "crapsack world" storyline, too many gestures in the direction of open world autonomy to keep getting sucked back into characters making unavoidable bad decisions one after another.