He's seriously just like, "I've found the meaning of life!" ------ I was also so sad, because I remember that episode when 10 said to Rose, that he wished he could meet someone named Alonzo, so he could say "allons-y Alonzo!
I want the Doctor to be my science teacher! Imagine the Doctor teaching you chemistry! If it was Eleven, he'd just want to blow everything up. Ten would be very careful and precise. Nine would just throw random chemicals in together