With the class previews all out now, I don't see my main changing.
I've still never leveled a shaman so their changes don't influence me.
I like the paladin class and will continue to play my pally here and there. But paladin healing has always felt kind of... thematically disorganized. I never felt their tools worked together all that well. The preview feels like they're going to throw a couple more buttons on the bar (which is not a bad thing), but they're still going to be a bunch of buttons with no unifying principle tying them together. I know that sounds odd but it's really just a long way of saying the healing style never clicked with me that well and I don't think it's going to change enough to suddenly feel natural to me.
The druid changes look okay, particularly considering that I'm going to race change mine to a troll and I can actually look like a troll and do the cool troll dance while still healing. I know many of the more serious/seasoned druids (i.e., real druids, not like me) are bitter over the change to tree form, but not being able to cast offensive spells bugged me personally, so I'm behind that. Still. They don't get Lifegrip.
Priest changes win. It's the same class, now with even more priestiness.
Anyone else more excited about another healer now than they are about their priest?