The ending of that book still upsets me when I think about it. It has power, yes, and it's not totally out of character for the bittersweet feel of the books, but wiping people's memories always feels like such a horrible cheating trick. And then Will gets to have and eat his cake but poor Bran can't? (I am remembering that bit very fuzzily, but I seem to recall that Bran is now the once and future human and Will is not.)