I am still playing Origins. The graphic is a tad worse than DA2 but mainly just the DX11 features and textures. But ... its not like we would play Doom in 1995.
To be honest, I was drawn to DA2 mainly for having a "house" of my own, nice realistic graphic, and good combat animations. I played the demo of DA2, I saw the rogue chopping people left and right, it was amazing. The graphics in DA2, and interface, reminded me so much of Assassin Creed. The reason I did not like playing Warrior or Rogue in DA:O or in general RPG is that they are quite boring. Just face up a big NPC, auto attack and press some buttons. Casters made more versatile game play. DA2 combat animations made it look so fun.
Well, after playing DA2, I felt I am such a superficial person

Yep DA2 has some nice looking armors (and the rendering on them) and nice mage's headgear (comparing to DA:O lousy headgear). Got a mansion, it's nice, but there is not much I can do with it. I can't even sit on a chair or take a nap in bed, let alone trying to add some decorations. The characters in DA2 are somewhat not as personable. I mean, they are there, but .... somehow DA:O characters are much more memorable. I did not know anything about DA universe until I started playing DA:O so this is my supposed gold standard. DA:O is a more traditional RPG like Baldur's Gate, NWN, or even older Ultima series type. It was fun, very personable, and has tons of little things to do and choices to make. DA2, hmmm, is leaning toward a linear story telling RPG type. To be fair, DA2 is meant to be told as a story, a quite risky approach for DA fans, so things follow a stricter time line than other RPGs.
And I think DA2 fails a few major things at customizations. I really hated it when I found out that we cannot customize companions' gear. Why? Afraid we would strip them naked running around town? If people want, the modding community will do it, no matter what. There is already a mod replacing gear with underwear. Soon it will be fully nude. It is our choice to play this $60 game as a great RPG or a lousy adult game. Although there may be more areas and more side quests than DA:O, I still feel "restricted" in DA2 for being stuck in that damn city all life. Sundermount is laughable. I went up there where we summoned Flemmeth.... it was supposed to be up very high in the mountain. But I looked down and saw the elf's camp not too far away at all. I mean I could repel down from there in RL or climb up from the camp, while the elves made it seem so far away. It would be nice if there is at least an area where we are actually .... on a ship, like one of NWN's expansion starting out right on a ship out at sea.
I am still playing DA:O very seriously. Although I am disappointed that there is still no good looking mage robes (beside the black Cultist Enchanter Robe), and DA modding community seems to stop working. At least, the Nightmare mode in DA:O does not have such "features" like "Knock-down lock" and "Clear action queue" hit.