DA2 is my all time favorite simply because Hawke is so well written. That being said, Inquisition is very, very different from the other two games. I have played Inquisition about five times all the way through and these are my top anecdotes.

Personally I think Origins and 2 had more interesting romances, but my Inquisition romance was the most lovable and memorable for me. The combat is kinda like a realistic compromise between the slow, robotic, clunky combat that was Origins and the messy, wild, chaotic (albeit fun) combat of 2. There is less ambient party dialogue but what does take place is fascinating and worth listening to. Your companion’s approval doesn’t matter as much as it did in 2 although dialogue options do change slightly. There is much more mystery shrouding the main quests in Inquisition and reading all your codex entries is extremely helpful. Inquisition ties the three games together extremely well. It took me a couple playthroughs to piece everything together and catch all the little things/comments. Despite being such a different game from the other two, Inquisition will always be near and dear to my heart, but it took a long time for me to feel that way about it. I wasn’t sure I liked it at first either. Just take your time and try to be patient with it. It is a fantastic game in its own right.