Flib said:
Paladins are much more interesting/versatile healers in Cata, though their healing output is currently pretty low. Druids are one of the easiest classes to level (especially come cata), and do more damage than shamans. While they're kind of stuck in tank healing rut in beta due to the lifebloom changes, I expect this to change down the road. Alison Roberts at WoW Insider had a nice article on cata druids yesterday:
http://wow.joystiq.com/2010/10/05/shifting-perspectives-predictions-for-cataclysm-druids/
Yeah, I like both the druid and the shaman, but they both have their weaknesses and strengths. Let me just break down my line of thought.
Druids
-Can fill any roll (kind of a double age sword in that Blizzard will make sure you are never as good as a core class, this happen in BC and will happen again if they become too powerful)
-Great at healing AoE damage
-Healing spells are more fire and forget type
-Great at escape especially as a PvP healer
-Has excellent crowd control with roots/cyclone
Shamans
-Great healing spells with chain healing and earthen shield, you save the melee
-You don't have to worry about changing forms, Need a healing spell just do it
-Have to stay in your totems' area of effect =(
-Weak on the crowd control till 70 with the spell hex
-Can be locked out by counter spells, most of his attacks are nature base till lava burst (I think you get that at 10 now in cata)
If I had to choose between them, then I would definitely go druid. Cat form is excellent. You have stealth, roots, cyclone, barkskin, and travel form if you ever need to get away. Druids are definitely more annoying to fight in PvP and their healing in PvE is awesome. Shamans should just stay in the back when it comes to PvP, but they do a good job in raids. Parting comment, priest are still number one.