I'd like to be a landholder.
I'd like a seneschal and/or chamberlain that are major characters that take care of my affairs while I'm out "adventuring".
I'd like for there to be a family. Either 1) My personal family which I can have. or 2) My brother/sister's family which I can rule over. OR an empty shell of a place.
What I do NOT want is a half-way house for a band of misfits (I.E. My companions)
I want my companions to have their own dwellings like DA2. Then I can have my chamberlain call upon them to ALSO have a central hub for encounters.
I'd like the land to have to be worked to be profitable. Want a farm (herbs)? Hire workers (or employ slaves). Want a mine(ore)? Same. Want a gaming forest(leather)? Quarry? Lumbermill? etc. No more collecting (though finding mines or arable land like you find lumber mills and quarries is preferable)
If they're going to have a living space... I want to "live" in it. That means - I want the game to focus on more than going out and killing crap. It's such an antiquated form of poor storytelling. Yes... combat is necessary (it isn't really, but the gaming community hasn't reached this place yet).
Bioware's strongest attribute is telling stories through the companions. I believe DA:I was it's best yet... Cassandra being, for me, the greatest character in video games. I felt her story was VERY strong. While other characters hit high notes throughout as well.
BUT... two things:
1) The biggest, I want to share MY story with the companions and have them react. Josephine does this a bit when asking about my parentage as a Trevellyan. I want more of it. A LOT more. And then - I'd like the world to sculpt around those choices as I continue with the story. I'd love for companions to react to it. Did I answer a dialogue with: "I love Genetivi's discourse on the Urn of Sacred Ashes"? Then I'd love for a character - friend or lover or just someone who's appreciative - to have a cutscene where they deliver this (or some other option) to me as a gesture.
2) Don't stop at the companions. SO many characters in DA:I could have been even more amazing... I know the danger... as Scout Harding isn't romanceable and it breaks people's hearts... but she's exactly what I want. More and more NPCs playing larger background roles. NOTE: And stop making ALL romanceables companions (yes, I know Cullen and Josephine - but they still seem like "almost companions"). You did it with ME 3 (I know, different group) - continue the trend.
Anyway... I felt this all had to do with "my dwelling" and it's only some of what I'd like to see.