So this weekend I switched specs four times. I went from enhancement to resto so I could get a group for ZF. I main healed and it went pretty well. We four-manned the hydra boss and the two main bosses in the snake room. I liked resto and am considering it for my lvl 70 spec. I then went back to enhancement to level up and I decided to try out elemental just because I figured having a shared set between elemental and resto would be easier to keep upgraded than two sets. I did not enjoy elemental as much. Ran through sunken temple with this spec and had some nice crits, but I think the thing about the shaman that I like is the good melee damage and the healing aspect, which is much different than my warlock.
So I think I will stick with enhancement until lvl 70 with the occasional respec to resto for instance groups.
Oh, and leveling up an alt is much better than my main was...with my main I didn't ever have much gold and gear upgrades only came about every 10 levels...now I upgrade about every 5 levels and replenish my gold supply with my main who is an 375 miner and 375 herbalist.