which house should you be in?

Oh, you may not think I'm pretty
But don't judge on what you see
I'll eat myself if you can find
A smarter hat than me
You can keep your bowlers black
Your top hats sleek and tall
For I'm the Hogwarts Sorting Hat
And I can top them all
There's nothing hidden in your head
The Sorting Hat can't see
So try me on and I will tell you
Where you ought to be
So put me on! Don't be afraid
And don't get in a flap
You're in safe hands though I have none
For I'm a Thinking Cap