Joan is a bit lost in thought, so she blinks as his hum brings her back. "Mmm? Oh. I was just thinking that it usually takes me a while to make a place my own. When I was a sober companion, I lived with my clients, so I didn't really have a space of my own." She gives Sherlock a glance and a smile. "Professional nomad," she says, echoing his words from a long time ago. "I got used to not really personalizing the places where I lived, sort of subconsciously expecting that I wouldn't be there long. But here...I'm looking forward to making this place ours."