We have pine boards right through the back of our house but only two rooms that are uncarpeted.

A few things I would seriously look into or consider:

1) they can be very cold in the winter. We have the master bedroom and a formal lounge in the boards and under feet in the winter its freezing.

2) make sure if you go with the original floor that you get a reputable person to stain and finish the floors. We use a different guy to MIL who did the lounge originally and there is a massive difference in the finish and quality. So much so that I will need to get the guy back to fix the other floor.

3) We have put cork or carpet things underneath the furnishings to help prevent dinting etc and it works really well.

4) I personally think a floating floor will add a little insulation to those rooms which you may want.

I love the look of timber floors, they are easy to clean but they do have some disadvantages unless you love rugs (which I don't).

hth

Nae x x