Verdict...
The header is awesome ! I love it, it's original, blends well with the blog - I give it a A !
I'm a little bit bothered by the pink background. It's almost to bright, too pink. I like the colour, but maybe darken it a bit... Although keep in mind I have a very large screen (lucky me !) so I see more pink than most users will.
Other than that, I like it !!!
