Don't remember them all, but saw a clip of the BB8 chair and didn't look comfortable at all, so I'll opt that as least fave.

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I agree, I think it's really interesting looking, But I get the feeling my legs would stick to it if wearing a skirt or shorts, and that it would be REALLY uncomfortable!
I like the diary rooms that actually look like an extra room,not just a chair in a box. Thats why I liked the leather walls in BB7,it looked very luxurious and cozy.