As a sweeping statement Europeans, especially Scandinavians and Germans prefer wood flooring as do most Amercians.
When To Carpet, When to Tile & When To Use Wooden Flooring
However, one can never guarantee who is going to view your home and given the multi-cultural nature of Australia, and particularly the Sydney market, when it comes to renovating with the ultimate aim of selling your property I would suggest catering for the middle ground and aim for wood flooring on the ground floor, carpeting in the bedrooms and tiled flooring in the kitchen and bathrooms.
When it comes to laying wooden flooring, please ensure that it is actually wood that is used rather than laminate – at a pinch one could use wood veneer but makes sure it’s at least 7mm thick.
Quality does count and so the thicker and wider the wood the better, just make sure it’s not at risk from warping due to overheated or damp conditions and that it is fitted correctly.
It would be a bonus if the floorboards underneath the carpeted areas in the bedrooms were in good condition then it would give the incoming owner the flexibility to strip the carpeting away and restore the floorboards if they so desired.