I only hate the fact that the Express edition will only work for Metro apps. ._.
EDIT:
Microsoft changed their decision. The complaints about only being able to make Metro apps were big enough in quantity that Microsoft changed their decision and VS 2012 will support desktop development as well.
The release should be somewhere in fall this year.
EDIT: I've been trying it out at work today and I have to say that I like it. VC++ is much better now, especially color coding of stuff and some other minor improvements. I hate the bland UI, but I can get over it.
EDIT: It seems that VS2012 overwrites some registry stuff of VS2010 so the VS2010 suddenly starts using VS2012's MSBuild setup. :/ This also caused quite a bit of problems for me as I use vs-android to build our Android apps and the latest version is not yet compatible with VS2012's MSBuild setup.
@winkio: It loads lighting fast, even faster than VS2008.