So, I can't quite decide if this is Ten or Eleven in this fic, but I'm leaning more towards the Tenth Doctor side of things.
"Coffee?"
Clara sighed, not looking up from her slumped position in the tiny, half-hidden booth near the back of the diner. "No, but thank you."
"You look like you could use a cup," he replied, and she heard the sound of him sliding into the other side of the booth.
She looked up, frowning at the brightly-grinning man who pushed a steaming mug towards her. "Look, I'll give you full points for audacity, but I’m really, really not in the mood to flirt right now."
"And I don't want to be flirted with, so that's all right then," he answered, his smile shifting from manic to kind.
"So...this is a thing with you?" Clara asked. "You find people having the day from hell and randomly bother them?"
"Well, when they look like they need a friendly face..." He nodded towards the mug. "Drink the coffee. You'll feel better."
What do you think? Tenth Doctor? Eleven makes companion choice relatively easy, but I can tell you, if it's Ten, it definately won't be Rose. I'm really leaning more towards Donna if it's Ten.