AC peaked with Brotherhood for me. The mechanics worked better in tightly knit environment's. The Assassin's theme worked better in those areas, in that era, the lore etc. The stealth mechanics were integral to the overall feel.
After Origins (played an hour) I never wanted to play another assasins creed game again.
Like this one, here comes Agatha and Anders wielding a fucking axe roaring loudly through a village. Stealthy as fuck that.