I’ll be a contrarian and throw in my vote for the second game - it’s rushed and flawed and the asset reuse is blatant to the point of being legendary, but the setting and story are the best and most original of these 3 games. Just being a hero of one single city instead of the entire world is surprisingly refreshing.
In general I’d say that 1 has the best combat/tone, 2 has the best setting/story, 3 has the best characters. I’ve heard that 3 can be quite enjoyable if you pretty much only do the main story and companion quests - but I wouldn’t know, I’m one of the poor fools who got stuck in the Hinterlands, and that mistake + the very underwhelming main story sapped my will to continue playing.
It is fun, but buggy + doesn’t have great performance in some areas. I’ve recently played it for a bit on 1.1 patch drop, and lasted for about 6 hours until I hit a brick wall of a progression blocking bug. There was a decently large thread about it on the forum, no dev response, no fix in the next 3 hotfixes, so I stopped playing. Might come back for 1.3 or something.