I've always felt that DA:O got it right. To be honest.
Hawke was a good storyline protagonist, but Hawke never felt like "me" or at least "my extension of me in Thedas".
My Cousland scion has always just felt right to me, I've replayed the Human Noble origin so many times I can recite the voice actors lines, with relatively accurate impersonations, with the sound off and the subtitles turned off as well.
The Warden always felt like "I" was fighting the Blight. Like "I" was uniting a broken nation to face a grave and imminent danger, like "I" was developing meaningful relationships with my companions. The Warden was special...because the Warden was a perfectly designed hole that allowed me to fit myself inside it.
Hawke was a great character, Lord or Lady, I had no true complaints, but there was no illusion of self insertion into the storyline either, because Hawke had an identity that was not my own, but Hawke's, so I was, in all fairness, watching an interactive movie, and not living a role playing experience as such.
The Inquisitor seems like a good step back in the old direction, but again...will the voice feel like mine? Will the personality feel like its actually me when it inflects certain nuances of language based on the verbal response I've chosen? Its hard to say without experiencing it, but the hole of the "mute" hero that the Warden left, was a hole for me to fill with my own voice, and my own feelings.
Anyways, Warden's are special because Warden's are us. We are the Heroes of the Fifth Blight.....and its a role that unfortunately continues to dwindle in significance as the time passes.
I'm not sure what BioWare's fascination is with attempting to introduce new protagonists with each title. If I wanted that kind of game I'd be playing something from Telltale.
Anyways I swerved a bit off topic. Sorry about that.
I think this about sums it up. The Elder Scrolls is very similar but I think part of the reason I could feel like part of the story, is that I could voice my own character (since your hero is generally voiceless). A voice in a game is a bit overrated, sure your character may scream in pain when injured or yell when charging (or shout when using a Thu'um). But other than that, the dialogue may or may not be accurate unless it is spelled out. The Soulless One (TES: Online), Hero of Kvatch (TESIV: Oblivion), Last Dragonborn (TESV: Skyrim), Hero of Ferelden (Seriously I like making these parenthesis quotes), these are heroes that I myself tailored (am tailoring) to my own liking. Each of their personalities depicted in different ways. Like right now, my favorite play through of Origins thus far is of a Circle Mage, who didn't hate where he was but was loyal to his best friend and chose him over any semblance of comfort.
It is these little things that made my Human Mage Origin, Rolyn Amell, the most notable character I had the privilege of playing as. And this is not just Nostalgia glasses that I have on, my Inquisitor just doesn't seem to be my Warden, like he doesn't feel as much of my inspiration as that of Bioware's. Not to say that Inquisition is not a good game, it is a wonderful experience and I really love playing it. But I do find myself wondering what Dragon Age would have been like if it took a more Mass Effect theme and stuck to developments circled around a singular character that unlike Commander Shepard, was yours. That game I am looking forward to playing the most, but for now, Dragon Age is certainly my favorite roleplaying game series of all time.
When a world story, an entire age perhaps, is affected by events that I as the player have influenced it causes me to enjoy the game that much more. And no other franchise seems to do that for me, even the Elder Scrolls simply doesn't feel as reactionary to my choices as Dragon Age does. I mean my world state can be vastly different (In DA: Inquisition for those who are reading this and aren't familiar with dragon age) due to the Dragon Age Keep, which makes it quick and easy--or long and still relatively easy, to change how my game is played.
So I know this is way of topic, but I do kinda wish that the Warden did return, or at least had a more substantial reason for not joining the battle. (I mean, the Calling is important, but I don't guess it will be that much important if Demons ravage the land in a way Darkspawn never could.)