Healed all the heroic dungeons multiple times before switching to tank. It's not that I found it hard to heal, mistweaver got some crazy burst so people didn't die.
But I really started to loose my sanity with all these monkey tanks and donkey dps, pulling like mad and standing in every ground effect on mother azeroth.
As a tank i got far more control and it's been great fun. Did all mythic as Brewmaster and maybe i just go lucky, but all of them were great. We used CC on most trash packs and just breezed through them all really.
It may be slower but if I ever were to actually have a dps complain they can take their shitty attitude and leave, dps are a dime a dozen and can always be replaced.
If people could get back into the Cata dungeon mentality, because that is were we are at now basically, things would be much better.