What I would do if you are unsure, is call the people that are going to live in the house.
Get a photo-copy of the house plans and work out with them where they would like everything put.
Regardless of wether there is a plan or not, I do this with every new place I wire.
It just saves time after the place is lined and you also win a few points with the HO too.
Personally, I'd allow for 3-ways in the bedrooms, ask them where they are going to have the head of the bed and put a switch or a dimmer there, there is nothing more annoying than having to get out of bed to turn out the light or turn it on without getting out of bed.
This is not a Code thing, just a matter of convenience.
You should be able to control the lights of any given room from all entrance/exit points, go for 3-Way + Intermediates, if you have to.
Just my 2c worth.