It's V3. 1 and 2 take a while to get going, V3 starts going fucking OFF from case 1 and doesn't stop until the game is over. The minigames and like mechanics of how each murder happens are definitely the best. It also has a dope ending twist, though the execution left a little to be desired, IMO, but I still liked it.
2 has the best cast, my favorite case in the franchise in case 5, and takes the narrative arc from 1 in a direction that builds on it pretty organically though.
I never played V3 because I recall there was a lot of backlash saying it was crap.
Has the majority opinion shifted or did I get an incorrect read on it the first time?
Opinions were pretty mixed on V3 at launch, it seems people have opened up to it over time? I think a lot of the DanganRonpa diehards were already kind of soured on the series because 3 (the anime) sucked. I played it a little over half a year after release and was just completely shocked at how completely dope it was when it seemed like no one talked about it.