I made a few tweaks, edits, and clarifications to my Karazhan guide, based on many of the comments. Once again, I hope at least some of you will find it helpful.
So I have my level 70 hunter, and I have my level 62 hunter. Oddly enough my third highest level character isn't a hunter at all. Nope-- she's currently a level 31 restoration druid.
Say hello to Tamaryn:
She was actually originally spec'd Balance until level 22 or so, at which point I realized that a.) everybody wanted me to heal, and b.) I can't DPS in an instance unless I'm DPS'ing as a hunter. I just can't. So to make my life more enjoyable, I had to switch roles completely. (Although sometimes I still do miss some of the fun stuff from the Balance tree and I'll probably go back and play with it post-Boomkin-level).
So she respec'd pure Resto and hasn't looked back. Solo work is not quite as easy as it is on a hunter (or as I'm sure it would be if I was spec'd feral or something), but it's still not bad yet. Right now I can toss a Regrowth/Rejuvenation combo on myself, pop into Bear form, and take on three or four guys at my level, wearing half-clothie Intellect stuff. Dunno how long that's gonna last, but for now, it's pretty fun.
But let's talk about healing. I've done quite a few lowbie instances now with appropriately-leveled groups, and also made a few forays into Arathi Basin and Warsong Gulch, and healing is very different. At first, it was hard to get used to. I wasn't really watching the action except for on the side; mostly I was just staring at the name plates of my party members and playing this game of whack-a-mole where'd I whack the appropriate name with a heal.
Then I started doing it more and more, and things got even more complicated. Suddenly I was in situations where everybody needed a heal and I had to prioritize. It sorta hurts to have my healy-button hovering over the hunter before realizing that the tank needs it too... and opting to give it to the tank. Because you can do things without the hunter but there's not a whole lot you can do without the tank unless everything's almost dead already. It really all came into perspective when a warlock I was healing, who has a priest main, told me "Stop healing me and heal the tank." I sorta hate to pick one person over the other, but... it has to be done sometimes.
Things I still have to learn and practice: healing myself (I am absolutely horrible at this; I watch everyone's nameplate except my own and then I end up dying) and managing my mana. To be fair, really the only times I've ran out of mana that I can think of are when pulls go horribly bad and we pull a lot of extra stuff. Still, I really have no idea what I'm doing as a sapling and so I've no idea if I'm doing things mana-efficiently or not. My current healy cycle consists of mostly Regrowths with Healing Touches thrown in if someone needs a big heal. According to the people I group with, I'm pretty good at it, but I still feel kind of paranoid. I know I can play my hunter, but I'm still learning to walk with my druid. (At least I know a couple blogs that can teach me all I need to know, right? =P)
Now PvP with a healer is actually really fun, I think so anyway. The only other non-hunter class I've attempted PvP with was a mage and it was horrible and painful and I gave up after about fifteen mintues. But healing in a battleground is a whole new ballgame and I really dig it.
Things I've noticed:
1.) I get sheeped all the time when I'm a healer. It rarely happens when I'm a hunter, but when I show up as a healer everyone starts flinging Polymorphs in my general direction. Which is hilarious because I can just shapeshift to get out of it and start healing again.
2.) A surprisingly high number of people do not seem to be aware of the fact that they can kill the healers instead of their target and it will probably make their life easier. I was in a WSG game where me and a holy paladin kept our flag-carrier alive for several minutes while probably no less than five horde swarmed around the guy trying to take him down. It didn't seem to occur to any of them that they could just come and take care of me and the pally first. Nope. The reason we eventually lost the flag was because the pally and I went OOM, otherwise we coulda kept healing indefinitely I'm sure.
3.) The few people that do have a "Kill all healers" mantra are very dangerous and will stop at nothing to destroy you. *hides*
Well, that's really about it. I just thought some of you might want to hear some rare non-huntery-WoW-stuff. My closing thought is that budgeting my talent points is surprisingly hard. As a hunter it's straightforward, for the most part, you drop five points in something and the rest opens up, rinse and repeat. With my druid, new stuff opens up before I've maxed something else out and then I'm forced to choose between maxing stuff out now or later. Soooo tough to choose.