what do you think, is enhancement shaman a "good" class for 4.3.4 ? Or do you prefer elemental? why?
and the last question, is leveling on 20x server a lot harder with healer than with dps class? I'm interested because I want to try a restoration spec on shaman for leveling.
Either spec will do just fine in 4.3.4. They are meant to be relatively equal in terms of damage, so it's up to you which one suits you best. For me, I don't particularly care for Elemental, but I love Enhancement. The fast, twitchy sort of gameplay and having so many tools at my disposal is precisely what I look for in a spec, but that's clearly not meant for everybody. Just keep in mind that while our damage is quite good, neither spec is meant to top the damage charts, nor should that be your goal with them.
As for leveling as a healer spec, I can't say I would recommend it unless you have a leveling partner at all times. Even if all of the low level dungeons were up and running, people don't use them enough to level, so you would pretty much need a dedicated leveling group to get to 85 in any decent amount of time going that route.
Both specs are good u just have to chose whether u like ranged or melee i prefer enhc since i got good agility gear from raiding
As for lvling as a healer i lvled as one upto lvl 40 after tht go elez, resto is great for survival since u wont be getting any good gear while lvling but it will make your lvling vveeeerrry slow
Elemental is alot easier to cope with for me, i hate being stuck in CC after CC and elemental makes it alot easier to prevent ccs, and when im in one i can usually cast my spells.
Enhancement is alot more patience, since you can be CC'd for extended periods of time and have to make good use of your damage when you do get near somebody.