Ianto/Jack/Martha
Oh, I don't care about being crowded, or even about the drama and politics - if you ever met my family, you'd understand that I'm very used to both. It's [...] complicated, but the short story is that the Doctor and I get along much better when there's a bit of space between us.
If you wouldn't mind looking it up, I'd appreciate it. It's not urgent, but if I had options, I could get in touch with my potential roommates and try to find the best fit.