Just a Doctor Who chatplay I did on Omegle, trying my hand at the 12th Doctor. (May contain spoilers for Christmas special)
So far I've used 2 quirks as the 12th Doctor:
1) About to say something logical/intelligent/etc. but says something else.
ex. "You left her tied up in another room while you went to pick out your new suit? Do you know what she could have done!? She could have given you a second opinion on what to wear!" (instead of "she could have tried to escape")
2) Getting names wrong.
ex. "Jo, I told you, I don't want any tea!"
"Doctor, I'm Clara, how many times must I tell you?"