Interesting to see love for AC III, as it is among the worst of the franchise for me, only above the first game. I think the recent popularity may be because it was recently free somewhere (Epic, I think? I got a copy of the remaster when I got Syndicate there, so it might be it), so some people might have decided to take a shot at it.
I never played Unity and Rogue (not sure if I’ll ever do, honestly) or Odyssey, which I already own and should play soon enough. My top3 would be Brotherhood, II and Origins, with Black Flag very close to them. Syndicate and Revelations are alright, but nothing special.