I do not have any tiles in my current house but if you think about grout discolouring and looking bad.... then I think that might answer your question. My thought - the less grout the better.

Hi there. If the tile you have has character, you could pull a colour from some of that character, for example if the tile had a beige fleck through out you could use a similar beige tile in the bedroom, otherwise just choose something that compliments the tile well to create a soft transition. Then use the colour of the existing tile in the room somewhere, with your bed linen for example or bedside lamp. Feel free to share an image of the existing tile.

Hi. We have a small to medium sized bathroom. Just wondering do you think I should tile floor to ceiling with 60cmx60cm light grey tiles stacked or 30cmx60cm in brick layout

This is the only photo. Wall colour is white and joinery is black. The floor tile is the light colour and will be in the entry, kitchen, family and dinning areas as well as bathrooms laundry and toilet. Can I pull off the dark carpet or should I choose a lighter shade to compliment the tile?