Liked: Layered characters, diverse cast, look and feel of the game.
Disliked: Filler content, the crafting schematics, lack of customization (especially when creating a character - same hair styles for men and women, why?!). Which leads me to what I disliked the most: the apparent lack of in-game development and progression.
There is an influence system that implies the growing power and presence of the Inquisition, but instead its only function is to provide perk points for lackluster upgrades (some of which are fine). The 3 keeps are really bland, the patrolling soldiers in some zones after quest completion are a minimal expectation, and the biggest downside by far is Skyhold. Even after finishing the main story and having been to every nook and cranny in the game, the great keep of the Inquisition, home to the now legendary Inquisitor, is a real shithole, honestly. The extremely trivial choices you make early on to decide between an infirmary and a sparring ground, mage tower and templar tower etc... are a nuisance. I find myself confused that the Inquisition has to decide, permanently, between a few wooden fences and two guys fighting for eternity or to rebuild a part of the castle that otherwise stays ruined forever - WHY?! Not to mention the battlements behind the stables that are destroyed, or the walkway leading up to the War Room or even the Inquisitor's private chambers.
All these things culminate and create a huge distraction for someone like me who enjoys detail and visual progression (surely many others do as well). I really can't fathom why Skyhold is left such a dump, even after the world is saved and especially considering the many noble houses supporting the Inquisition - they can't afford or provide upgrades and repairs? Although it's not enough to completely ruin the game, it's definitely something that stands out, more so in RPG games that especially rely on atmosphere, mood and environment.
Honorable mentions go to: Constant loading screens in Skyhold (really? main hub can't be more open?) and tiny tiny shack-sized Val Royeaux.