Jon- Great ending. Dealing with all of the wildlings was tedious at times. The whole sortie to Hardhome was definitely going to be a mistake, and the stuff with the Karstark girl was rather anticlimactic. That said the Slynt execution was awesome so was the last chapter leaves us with a lot to talk about. Hard to tell what was real in the letter and what was fake. Also, 4 knife wounds means Jon is probably dead but I expect either him warging into Ghost (or something similar like Varamyr talks about in the prologue) or Melisandre goes Thoros on us. There needs to be a perspective at the Wall, so I am confident that Jon will be around in some capacity, even if its undead (and it might be cool to see the perspective of someone coming back).
Davos- Really liked his chapters. Was a little pissed that he had a great cliffhanger and there were still about 500 pages left and he didn't show up. Still him trying to find Rickon on Skagos could be interesting. Also, Manderly is freaking awesome, in these chapters and especially later with the "meat pies".
Theon - Probably my favorite overall arc of the book. Obviously don't like his character based on Clash and a lot of unpleasant stuff happened to him, but it was really interesting to see his transformation in and out of the Reek character and regain a little of his real self. I also just like the characters of the North.
Quentyn - Overall a pretty useless character. I guess his presence was necessary in that Dorne should have tried to get to Dany in some way. Didn't care for his early chapters but he did die an interesting death so I'll give him that.
Arya- My favorite character so I really liked her two chapters. At least she is making plot progress which is more than could be said for many of the characters.
Bran- Definitely interesting but not a ton going on. Will not become a huge factor until the end of the next book or the last one.
Connington- Good back story. I don't know what to think about this other Targaryen. Could throw a very interesting wrinkle into everything as we've assumed it would just be Dany coming to Westeros to versus the Lannisters and the Others (or something close to that).
Barristan - A lot of interesting history with him as a POV, but more about the overall arc later.
Jaime - Nice that we had a chapter from him but it pretty much took his story where most expected it would go with no resolution.
Cersei - I liked her chapters ok as well. Definitely some catharsis in seeing her suffer, but nothing that was too unexpected and didn't get to her trial so didn't serve too much purpose. Also, how is anyone fooled by Un-Gregor?
Tyrion- Another of my favorite characters but I found his chapters rather tedious. I understand the literary need for him to slowly introduce the idea of Aegon and for him personally to reach rock bottom, but there was too much cyvasse, sitting on boats and dwarf jousting. And by the end he still hasn't even met up with Dany.
Dany- Her story needed to develop slowly also as she supposedly learns how to rule but the whole east storylines were a disappointment to me. What was this Mereenese knot that GRRM was so worried about? Tyrion barely even got to Mereen and Victarion didn't. Also, how retarded was Dany to not have seen through Hizdhar? I mean all of a sudden he comes along and the murders stop immediately? Clearly something is up. The chapter where she finally flew Drogon was cool, but for the most part her chapters were slow and there were too many. No one cares about Mereen but I was ok with letting this book be about getting the pieces in place to get her the hell out of there. Instead, the only piece that got there was Quentyn, and all he added to the story was dying. It looks like we have at least another half of a book for them to really get moving. Not only that, but in the end I'm not really sure what experience or wisdom she supposedly gained by this meandering journey. She clearly still isn't very good at ruling a city.
I don't want to sound too harsh though. Overall I liked the book a little bit better than Feast (mainly because I really didn't like the Iron born or Brienne chapters of Feast) There were some other great moments not mentioned (the epilogue and Barristan fighting the gladiator who had no idea how to attack armor for example) Martin is a great writer and honestly it is his style and writing that have helped get through the past two books where the plot has really dragged. I hope the next books come easier for him and we don't have the wait we have had for these two.