Over a decade ago now, when Tennant was still The Doctor, (I think during the airing of either the 1st or 2nd season with him), I managed to learn a fairly close approximation of his English accent and verbiage from a few online friends I had at the time (I am American with a PNW accent).

Halloween was coming up. I managed to find a blue pinstripe suit at a thrift store. Told all my friends who were hosting a Halloween party to just pretend I was an exchange student.

It actually worked, I was able to convince everyone who wasn't in on it that I actually was English.

Sadly, practically no one knew of Doctor Who.

I remember multiple times saying 'why I'm the Doctor' as a response to 'What's your costume?'

This was then followed by 'Doctor... Who?' to which I would reply 'Precisely' or 'Yes, you've got it'.

To which they would make a confused face and I would then suggest drinks, as one of my multiple hearts broke and died each time someone had only the vague notion that I was some strange Englishman, out of place, perhaps even out of time.