When I first ran around TBC, the Fel Reaver scared the hell outta me. Ground shaking, crazily running everywhichwhere to get away. And the Draenei spiders still creep me out. But by and large the monsters now have a "ho hum" quality because I'm too used to them. My question is, are there any monsters in LK that will scare me or creep me out for at least a while?
There are most certainly a bunch of those. There's a lot of "whoa, cool" mobs and "holy crap what the hell is that" mobs. My favorite is the geist (pictured above), and it sounds like a lot of our other readers adore that one as well. It has a very maniacal laugh when you aggro it. The Revenants are cool as hell, except for the Earth revenants which look like floating poo. I don't mean they look bad, I mean they actually look like poo. Also: Thrym in Zul'Drak. I won't tell you what he is or what he looks like, but you'll know him when you see him. Just remember the name Thrym. There's plenty of other cool/freaky models in Wrath, too many to name, so yes. There are monsters that will scare you and/or creep you out.
Is there still reputation gains and factions involved with raids? Does Naxxramas, the first raid, have a faction(s) attached to it?
When I ran Naxxramas earlier in the beta, I wasn't gaining any reputation at all. I don't think it's tied to anyone, but maybe that's something that changed very recently. Unfortunately, I don't have a raid in my pocket that I can pull out and go check, so that's all we have to work with.
If there was a reputation attached to it, I'm not really sure what it would be. Valiance Expedition/Warsong Offensive would be silly, because you can get to at least halfway through Revered with them purely through questing in my experience. The Argent Crusade is also very, very quest heavy.
So Naxxramas didn't initially give rep, and I don't imagine that has changed any.
What are the airships for?
The zone of Icecrown is so packed full of Scourge that the Horde and the Alliance haven't managed to grab a foothold. The Alliance tried and very nearly succeeded, but there were... issues. Dealing with one enemy? No problem. Dealing with two? A problem. I won't tell you what went down, though.
Instead of a ground base, the Horde and the Alliance each have an airship that flies circles over the zone.
The only factions that have been able to grab land in Icecrown are the Argent Crusade and the Knights of the Ebon Blade. The Crusade has gone in guns blazing, rocking out, smashing Scourge en masse, while the Ebon Blade has used shadier methods. Subverting Scourge leadership, assassinating key targets, yadda yadda. It's a very cool dynamic.
I know you covered which starting zones have the most lore for different races. But my question is which classes should go to what zone for the reputation rewards. I have a Lock, pally, and warrior and some factions may have better things for each of these. What zone should each class go to for rep rewards?
It doesn't matter a whole lot, actually. Both zones have a really good spread of quest rewards, and I haven't noticed any items like the Hellfire Peninsula blues that last you until level 68 for some unholy reason. Where you quest in the beginning won't make or break you, and both zones have something for everyone. Just go to whichever zone you think you'd like better, or where your friends are going, or whatever.