Yep. It's been said several times already:
Origins is probably my most replayed game ever. Currently on another playthrough right now. While I'm one of those boring sods who develops a headcanon character and always plays them in subsequent playthroughs of any RPG, I still never get bored. I teared up when Eleanor (Cousland) told me to leave with Duncan and stayed to die with Bryce. I still felt devastated for poor Jory at the Joining. I'm currently on my way to the Circle to sort their mess out and get help for Conor and Eamon, because I wouldn't trust Jowan with a shopping list, not to mind saving a child from a demon in the Fade!
Sending Morrigan is more satisfying to my headcanon - she huffs and puffs about it, but she did it out of her growing friendship with my Warden.
Origins has its flaws, but they don't bother me. I game more for story than combat or gameplay, so I always found the combat fine. Difficult enough on harder settings. I never play as a mage in any RPG, so when everyone dies and I'm left with Morrigan it's quite entertaining. "SHAPESHIFT QUICK!!"
The world, the story and the characters are compelling and wonderful. As previous posters have said, they're like old friends. I care deeply about the characters. To be honest, the best thing about Inquisition for me was seeing Leliana and Morrigan and how they've developed. I wish there was war table banter/a few small cutscenes between them. I get the impression they have lost their antagonism towards each other and now have a mutual respect. For my Warden they were surrogate sister and lover (with a bit of unrequited love towards Morrigan, who selfishly decided experimentation wasn't her thang.
), so their bickering was a source of exasperation. While I am one of those controversial people who didn't hate DA2 and actually quite liked it (it has far more flaws than Origins, but I think it excelled on smaller storylines and characters), Origins is still the best. Inquisition is...well I haven't made up my mind. I need a second playthrough that I've planned out a bit in advance. The open world mish mash keeps stopping and starting the main story, so it doesn't have good momentum IMO.
But yes: Origins will always be my true love. 