I've now finished DA:I and have a completed World State in the Keep for DA4. I will say that, out of the three games (Origins, 2, and Inquisition) I think that the Inquisition party feels the closest to me. Like they're the ones I feel would actually want to stay together after all was said and done, helped I think by the fact that so many say that's what they want (with Sera almost starting to cry if you have the Inquisitor tell her that Skyhold will always be her home if she needs it). With Origins, it really felt like everyone was there and working together purely because of the mission to stop the blight and no other reason. With 2, it felt like they were there and working together because they lived in Kirkwall and wanted to make their lives easier. But with Inquisition, everyone who was there chose to be there, and sure it was for a cause . . . but also we got bonding scenes like them playing Wicked Grace together, or eating cookies up on rooftops. Even when they fought with each other, I felt a real closeness there. Like it was them against the world (which it kind of ends up being during the Exalted Council).

Of course, this is just all my opinion, and it's possible that this had something to do with how the personalities of each character developed over my playthroughs, as well as the fact that I found it a bit hard to track people down in Kirkwall sometimes and as such didn't bond with my companions as much as I would have wanted. (RIP Fenris, I missed the opportunity to do your character quest and so you died 😔). But at the end of DA:I Trespasser, I had the Inquisition stay together not just because that's what my Trevelyan wanted (as making the world a better place / helping people is very important to her), but also because I didn't want to see the squad break up, even though they had to break up a little due to responsibilities elsewhere in the world anyway. It's just how they made me feel.