The Argent Tournament is great, I just wish it didn't take almost a week of dailies to start earning the Champion's Seals to buy stuff with.
Flame Leviathan is an awesome encounter, I just wish it wasn't the easiest fight in all of wrath (we 1-shot him in 25 on our first attempt ever, without reading any strats)
Keybindings for interacting with your target is a dream come true!
Every single one of my 50+ addons worked flawlessly with the patch. I ran the curse updater while downloading the patch, and everything was 100% perfect when I logged in.

My only complaint is the instance issues trying to raid. We canceled the raid last night after a couple hours of "Additional instances cannot be launched" errors.