It's a beautiful home and in a great position! I recommend changing the wall colour, light fittings, window dressings and carpet colour. Not sure why fans are needed in such a large house in Tasmania's climate. I would not paint any of the timber ceilings, replace the kitchen or any of the timber or slate flooring. Replacing the furniture with the style of furniture you love (not with modern furniture which will go out of style before too long) would also make a big difference in making the house feel more cosy and homely.

I omitted to mention- the Slate has a green colour through it.

I like the idea of painting the walls. I feel that this alone could make a huge impact to the overall look.

The above comment on the walls are too similar in colour to the timber and that could be a contributing factor to the wood feeling overwhelming (as a few people have mentioned) is a good observation, so thank you.

Any suggestions on the kitchen bench tops? Rejuvenate the timber bench tops or replace with stone to add contrast?

Pascoeyvonne- what sort of window covering and wall colour would you recommend?

I would choose a light, warm colour for the walls. If you are uncertain what to use, you can pay for a colour consultant will go to your house to put forward their recommendations. According to their website, Dulux charges $150 for this service. I think it's worth that amount if undecided on colour.

I love plantation shutters, however, with the extra large windows and doors in your house it would cost a lot to install them. Alternatively you could use layered curtains or insulated curtains. Use heavy fabrics or layered curtains over the windows to keep out drafts. Or, purchase insulated curtains with built-in thermal backing. Window pelmets are also good for keeping out the cold.