The HoT ones were fine (barring the trash before Murozond. Ohgods). Outside of the clusterfuck that was Jin'do, I didn't mind ZG and thought it was a neat concept with minimal trash and minibosses. ZA however can die in a fire. The launch heroics weren't TOO bad (exceptions being Deadmines and Grim Batol) but I hope Blizzard learned a valuable lesson: With LFG and pug expectations, you can't have long and challenging dungeons.