Who are your favorite party combinations?

Sera, Dorian, Bull. Team YOLO and by far my favorite combo.

I also love Sera, Blackwall, and either Vivienne or Solas. I love Bull with Vivienne. I love Cole with pretty much everyone.

Sera, Dorian, Blackwall, Mage Inquisitor
Solas, Dorian, Cassandra, Rogue Inquisitor, Solas replaced with Varric eventually.

Solas, Cassandra, Varric.
Solas, Iron Bull, Cole.
Dorian, Sera, Blackwall.

Dorian and Sera, plus one other depending on Inq class and the mission (but normally Cass). Their banter together is just great. They also have my favourite specialisations for NPC's of their class.

I like going with the characters most centrally connected to the story so I always try to pick the best companions story wise for every quest I do. My 3 most used are easily Solas, Varric and Cassandra. But I also use Bull or Blackwall a lot. Sera and Cole are really the two I use the least... in my opinion a double mage class is easily the best group to run. Ive played through the Game like 7-8 times now, I’ve played as everything and mage is always my favorite. I’ve probably been a mage inquisitor at least 4 different times. All my mage party members get their defensive ability’s tree filled out first. I make barrier their favorite ability and sometimes I’ll have them set to “defend” whoever my warrior is... and like I said, depending on the mission I switch it up. If I’m going into the fade or into elven ruins, I want Solas with me because I know I’ll get some extra story and dialogue. If I’m going to fight darkspawn or red templars, maybe I’ll take Blackwall. For dragons I always take Iron Bull...

Cassandra, Vivienne and Sera. I like their banter, specially if I'm romancing one of them. And all of them are very useful.

Dorian, Sera and Iron Bull is never not entertaining. I've also switched him out with Blackwall, since he and Sera have some good banter.

I also love Cole, Iron Bull and Solas. All the dynamics involved are rather interesting.

For dragonslaying, I always have Cassandra, Iron Bull and Vivienne. The ladies are death machines and Iron Bull is always so giddy at seeing/fighting dragons.

If I really want antagonistic banter, it's Blackwall, Vivienne and Sera. Or Sera, Vivienne and Solas if I'm playing a non-mage.

I use pretty much every companion to some degree to another, and usually adapt my party based on currently active missions and where I am in the story. For "general" use, though, my preferred usual mix is Varric, Dorian, and [love interest if applicable], mostly because I like to make the companions that carry across games a major part of my party in both games they appear, and I figger Dorian will be the carry-over if/when we get DA4. And even if not, it results in some pretty sassy, lovable teams.

I tend to use the starting party until I am able to solo everything.

Cassandra, Varric, Dorian.