Living Room should reflect your Personality to the Guests.
Living Room should be Spacious and Vibrant.
Your Office should not be a boring plain design, it should greet your Customers/Visitors with warmth.
Dinning Room should be Comfortable with enough Natural Light,Spacious ,close to Kitchen.
The chairs should be so very comfortable.
Kids Room should be according to the Kids Hobby,Interest.
The space allocation should be done keeping the near future in mind when the kids requirement will change as he grows up.