Could:
Willow - cause, c'mon. Do I really have to explain it? (sw)
Angel - He'd keep me on the right track.
Giles - I love books and reading. He'd have lots of books, and I'd love to have a house smelling of books.
Xander - A carpenter is always handy.
Could Not:
Dawn - I already have a little sister. I don't want another one.
Spike - I don't like living with a smoker already... Plus, he'd get all touchy about Angel being the favorite in the house, and just ugh.
Cordelia - I don't have a big enough bathroom to house both she and I when getting ready.
Kennedy - Besides her trying to put the moves on my girl, I'm already a strong, opinionated woman. I don't want another in my house. She can sleep on the porch. 😛