The quirky nature of The Doctor can certainly be amusing, but there are other times it can be off putting for his human companions to see The Doctor acting in what they consider a callous manner.
But there have also been times when The Doctor does act more human, with more feeling, if you will.
Doctor Who: The Return of Doctor Mysterio will air in December on BBC1 and BBC America.
But then, perhaps wiping his memory had other effects, leading The Doctor to begin acting in more strange and alien ways.