Amalur is a good game but outside of the faction quests, there was absolutely no reason to do most of the side quests. I gathered myself enough money to buy the best armour in the game and then it became a joke. It was too easy in the end because of this and as there's no NG+ to follow up after completion...eehh, replayability isn't as plentiful as it should've been. It had a lot of potential but nothing was done with it.
Certainly worth the playthrough, it's a good length and the faction questlines are useful depending on what class you're playing but that's really about it.