I thought Matt did an awesome job, right from the get go. By the end of the food scene in the kitchen I was fully accepting of him as the Dr (BTW, I didn't feel it went on too long, I thought it was necessary to show the foundations of their relationship that left Amy waiting for him for 12 years).
His comic timing is spot on, there were loads of funny lines that were all delivered beautifully and he does seem to have many layers, and that brilliantly set up scene, with the previous Dr's and monsters montage, which he stepped though, in outfit, to deliver 'Hello, I'm the Dr' (obviously to us as much as the giant eyeball) I just thought 'yes Sir, you really are'
Oh, and by the end I was finding him really quite attractive, in an off beam, quirky way, whatever it was he was doing it was working for me