Liked
1. Graphics / soundtrack all stand out to me, especially the latter.
2. The characters (companions, advisers, the occasional NPC): I either adored them or loved to hate them, but few felt flat or boring. They have their own very distinct personalities, motives and you can't ever keep them all perfectly happy... Have I mentioned how I love the lack of generic gits to buy their friendship? (Always thought that was slightly creepy in DAO.) The romances - while not a must have for me - are well done. There are a few restrictions that don't make sense, but that is pretty much the same in real life. (And anyway, there's bound to be a fanfic on it, sooner or later.)
3. The consequences: in the world of Dragon Age we already have so many decision points/potentially relevant events that creating an "AU setting" depending on each is not realistic (thought it would be cool). But I'm happy with the choices / results that are included: despite being a completionist at heart (yeah, yeah, have to track down that last remaining shard if it kills me) I loved that you couldn't simply go the uber-diplomat route and unify both mages and Templars = things sometimes have a steep cost. It's nice to acknowledge that.
4. The lore and the reveal(s): although I'm not one to slavishly read every bit of note someone had dropped... the expansion of lore we got in this game is staggering. Especially love the Chantry doctrines slowly being challenges and the new direction starts to earn that "dark" in dark fantasy in my mind. My one problem with this: in a setting roughly equivalent to the late Middle Ages, how come so many things would be written down? Like the hunter's notes on his traumatic experiences in the Hinterlands... How may peasants do you think knew how to write? Or had writing utensils on hand? And felt like recording odd bits of their lives for the ages to come?
5. Some of the technical/story changes: I'm one of those who enjoyed the restriction on healing. Also, the changes to the abilities - though I don't really get the 8-ability limitation.
Disliked
1. The missed opportunities. Skyhold comes to mind, but there are quite a few... I loved the idea and spent time and effort on the upgrades. Which never make the slightest difference in the end, as the final confrontation with Corypheus is a rushed affair a a long way off...
2. Lack of body sliders - if I go with human, for instance, my Circle mage will look just as beefy and muscled as my warrior. Very annoying.
3. The semi-open world is gorgeous, but there's not much else to do, beyond the scripted encounters and conversations. Why not add a few random conversation options to set the scene or include a few animations to show the result of your actions (i.e.: as you start cleaning up the rifts, the flood of refugees dwindles, they no longer look quite as haggard, etc.)
4. The occasional poor technical execution, including the initial glitches and bugs (like Inky running into Skyhold's courtyard and unexpectedly stepping into nothing - though buildings etc. slowly started to pop up), the so-called tactical camera... which wasn't. I'm not one of the people saying that DAO is automatically better, but really, this is nothing compared to the tactical cam we got in DAO.
5. Too much Skyrim in my Dragon Age story, aka fetch quest galore, aka not enough meaningful side quests to flesh out the world. In its own, I don't mind having throwaway, rinse and repeat quests as well (I'm sure there are plenty who enjoy it, if only for the XP, and they can be skipped by those who do not), but I miss those that while not integral to the story add depth to the setting.