@TonyMcS
I mostly agree with you. Tanking heroic PUGs is too frustrating, which led me to completely avoid them; besides, I can only have more than half hour of uninterrupted gameplay during weekends (mind you, I can usually play multiple hours per day, only they aren't contiguous). Besides, heroics going for over an hour is just too long; being stuck for a few hours with a single bad group could make me unwilling to play for a few days (I'm too loyal for my own good, so I would stay until the group broke apart even if other players were unreasonable or I was sure the group would be unable to complete the dungeon).

So, I did almost no heroics, which meant no chance to get the needed gear to raid, which meant my guild lost it's tank.

A month after Cataclysm I unsubscribed. No use paying for a game that was more frustration than fun. Other MMOs right now are much more to my liking.

BTW, for me, the two best heroics up to now, regarding both difficulty and length, were PoS and HoR. Loved them. FoS would be nice too, if it had less trash (and either railings on the pathways, or a way to rezz any foolish player that fell; it was tiresome to wait for someone to get back and run the whole instance. How I love the way DCUO lets the player keep all his fast travel options even inside instances).