He can't help but grin, he's proud of their ship. "Yep, built it working from the start, but with our luck it'll get stuck anyway. It's not that I don't love her as the Police Box, but...new start and all. And yes, Jack, perception filter came first. Since I, wellll, sort of smuggled it in to Torchwood for a while." His hand slides down to wind his fingers through Rose's, finger touching her ring. Leaning closer to her, he whispers for her only, "Sorry, I'm trying, I am. I'll try harder."
Louder again. "Right, excellent coffee has been promised and I intend to test and judge!" His smile is a bit manic, as he tries to overcompensate for the tension.