Favorite Raid: Salvations Edge
It has a good balance of being challenging, not too long, but also not completely brain dead like RoN. Also a satisfying raid lore wise.
Least Favorite: Garden of Salvation
Raid is too easy until the boss. Then that encounter requires everyone to be 100% on their shit. Throw in a terrible mechanic with the tether, a bad exotic quest, and lore completely inconsequential to the overall story and you’ve got a really bad raid.