OK, so I know there are very mixed feelings about Cataclysm out there right now, and there are enough blogs out there that have dissected all the new features, that I'm not going to go into a ton of details. I will say that there are a couple of things that I'm pretty excited about. The first is the revamp of Azeroth. As someone that is now working on taking their 5th and 6th toons through the Azeroth leveling process, I just find it incredibly painful at this point. The quest lines in Outland and Northrend are just so much better organized and flow better that I'm really looking forward to the old world reflecting more of the new style of questing (and hopefully quest rewards as well). Having new content to see will get me more excited about leveling addition toons to 80.
The other huge excitement factor for me is rated battlegrounds. I love PvP on almost all of my toons. And it annoys me to death that I can't get the weapons, off-hands and ranged / other pieces because I don't particularly enjoy arenas. So rated battlegrounds will solve that for me. Plus, having my performance in rated battlegrounds somehow contribute to my guild leveling is just another huge plus. And, I'll be able to completely gear out my toons in PvP epics! woo hoo!
Now, for a leveling update. With the addition of "Mangle" at level 51, leveling my druid has become much more fun. Granted, my rotation has become a lot less complicated (Pounce, or Faerie Fire, then mangle, mangle, mangle, ferocious bite..dead). But it works.
I've also found that unlike leveling my warlock or even my DK (which I did relatively early in the expansion), I'm extremely popular as a druid - wanna tank this, wanna heal that? Sure! I'm not really spec'd for it, but what the heck! So the druid now sits at a very happy 61 having done lots of Ramps runs in Outland. I do hate those starting quests in Hellfire. I headed for Outland at level 58 and I think that might be just a touch too early for a feral druid. A couple of the early quests were a bit frustrating. But we should be on cruise control now, and flight form at level 60 should make it a breeze from here.
I've also been playing the paladin a touch and she's currently sitting at level 26. Also, reading Darth Solo's blog and all his adventures soloing the instances of Outland may inspire me to shake the dust off my hunter, who is currently sitting at 58 in Outland (and who I am confident can handle those early quests courtesy of his thunderstomping bear buddy).