- while the character specialisation choices are valid, however they don't much affect me, they are indifferent for me (I understand they are very important for others) - just like being able to play with different races is insignificant for me, so in my "goodness" bar they play no role, just like eg. price or platform plays no role (obviously in my interpretation) - so I accept whatever opinion people bring up here
- appearances: not my priority, backgrounds and environment are better in DA:I, however plastic feel of DA:I is not to my preference. Something I endure. Facial expressions are better in DA:I (I don't know wether this is objective or subjective, I don't know enough graphic design for this)
- emotional highpoint of the game: DA:O had it at the end or right before the end, DA:2 had more then one, DA:I had it in Haven -- DA:2 is the best for me in that regard
- companions: DA:I has the most interesting character set, with the most in depth character formation consistency, hero-undependent personality, then DA:2 and then DA:O
- companion quests: DA:I has the most elaborated and in depth character side quests at times with multiple elements
- npcs being part of the world: DA:I's characters were the most reasonably fitting characters, again with npcs having their own agenda and motivations and personalities and responses to the world and its events. DA:O npcs didn't really much reflect to changes or plot stage, in DA:I ambiguous chatter reflects on you too, like after Mythal's temple Skyhold elves were arguing about it pointing out the importance of an elf discovering the truths within and if the Maker is real or not after all this, like people wanting to join the inquisition and doing work, like some of them only doing it if you are a certain type or person
- story: DA:O didn't actually branch away that much. Become grey warden (no matter what you thought about wanting to be one or not): You had to convince 3 parties (you couldn't go to lands meet prematurely, no matter what), then beat Loghain, then the Archdemon. If you strip the game to its plot, that is the plot. DA:2 had the most wide branching plotline, for it has more then one event that nudged your story. You had to flee Lothering, gain entrance, build up power, save the town from the Qunaries, handle mage-templar issues and eventually flee the town. More down to earth and very personal on the skin experience. DA:I is again distant, the game is once again not about the protagonist, but about an institution and a threat more then about people. Learn how you can close the breach, get chantry support, get mage/templar support, get orlais or not, deal with the Wardens, deal with the Venatory, deal with Well of Sorrow, get your dragon, beat the boss. I think based on this we can say that DA:O had the shortest storyline.
The origin stories were better then DA:I obviously.
Origins intro quests: basically become Grey warden wether you like it or not, and then things just happen TO you.
Joining the Grey Wardens
Tainted Blood
The Grey Wardens' Cache
After the Joining
The Tower of Ishal
Lothering and the Imperial Highway
DA:I intro quests: Wether you like it or not, you become member of the inquisition, first things happen TO you, but the chance is offered that you take over. No chance not to become the inquisitor.
The Wrath of Heaven
The Threat Remains
Champions of the Just
In Your Heart Shall Burn - rescue missions
From the Ashes - I put this here, for this is where you become the inquisitor
Main story line
Broken Circle: templars or mages
In Hushed Whispers: mages become slaves or equal partners, fate of Alexius
The Arl of Redcliffe + The Urn of Sacred Ashes - save arl, Ashes spoilt or not, Conner lives or not, Jowan's fate
Here Lies the Abyss - Jana's fate, Convince Carell or not, warden or Hawe, fate of Erimond, fate of Wardens
Nature of the Beast - werewolves, dalish, both
Champions of the Just - never chose this yet, no opinion, sorry
A Paragon of Her Kind: - Bhelen - Harrowmonth, void - no void
What Pride Had Wrought: fight elves, ally with them, obtain permission or take right, run after opponent instead, drink from well, let your ally drink from it
Landsmeet: Anora (with HoF), Alistair (with HoF), Anora+Alistair
Wicked Eyes and Wicked Hearts: Fate of Florianne - expose her(execution or take away), detain her (boss fight), let her succeed (boss fight); Briala (reconciled, blackmail info given to Celene), Celene (dead, ruler - with Briala), Gaspard (executed, exciled, ruler- with Briala), truce, they rule together,
DA:O ending: The Battle of Denerim (HoF or Alistair dies - God baby)
DAI ending:
The Final Piece
Doom Upon All the World
Disclaimer: I might have left out things, the games are huge and my memory is not covering everything I ever encountered.
There are areas DA:O did better, but a quite few where DA:I is better, imho based ont he above.
The emotional highpoint was wrongly distributed in DA:I imho, and better in DA:O. There were more decisions at the end of DA:O and more decisions in the middle and at the beggining of DA:I. All in all DA:I story was longer and gave more room for decisions. I believe side quests tied more into the main theme, then those of DA:O (red lyrium quests, weakening Samson's armor, which was a multiple person quest, finding the wardens, dealing with Crestwood while at it).
Both games had simple quests, eg chanter board, shards etc. - not my table in any way
DA:I had more unrelated, not story relevant side quests, such as Hissing Waste quests
I believe if the emotional high points' and the decision making places' timing would be different, many complaints would be less vocal.
There, my 2 cents.
edit:
forgot to add LIs, but basically they tie to companions. LIs in DA:I were more spread out and had more content then that of DA:O. More choices and variations, and actually DA:I LI's had more spine then DA:2 compaions in that regard. I like the path they chose for romances in this game even over DA:2.