Sometimes I think ToC/ToGC gets a bad rap because it came directly after amazingsauce Ulduar. I didn't like the 1 room nature and lack of trash, but I felt that ToGC was actually an okay raid. The balls of doom in Twins was fun and Faction Champs was excellent (I know there are people that wanna say "keep your PvP outta my PvE", but really, it was fresh). Dragon Soul was just.......meh. The only thing that was interesting was Spine. Everything else felt recycled and rebranded. But nothing was worse than OS. Unless you were doing OS+3 before you were so outgeared for it that you could zerg it before Immunity, there was very little challenge involved and it was boring.
- - - Updated - - -
I know because it's difficult to be more aware of situational fighting as opposed to "Must Use Rotations". Most of my guild didn't understand the mechanics behind it so I actually had to switch over from my pally main to my rogue in order to stunlock one of the healers so that we could progress.