I love shamans because they do not have any of the following:
1) Secondary resource. (Paladin, Monk.) 2) RNG procs. (Pretty much everyone except shamans and disc priests.) 3) Heal by absorbs. (Disc Priest and to a lesser extent Holy Priest/Paladin.)
Definitely the most no-nonsense straight up healer. I hope we are not cursed with one of the above mechanics in some future expansion. Also glyphed Healing Stream Totem with T15 2-piece is so ridiculously OP. Can't wait to get 4-piece which somewhat lessens our main weakness in this tier of encounters.
"For what is a man profited, if he shall gain the whole world, and lose his own soul? ..." - Matthew 16:26