Hi Sue, I think it would look amazing if you used some tiles with a bit of texture. The wood look tiles that are popular at the moment would be an example. If you chose a colour that toned in with your floor you would get a really nice cohesive look but with a bit of interest. I've attached a photo of a recent design of mine as an example. Just a suggestion!

The size of the tiles is dictated more to the skill of your tiler. Some tilers prefer smaller as its easier for them to get the fall right. Using wastes that are linear like the grates make it easier as its straighter for them to cut the tiles. Having round drains do make it harder to tile a fall in the floor with larger tiles but now days there are so many choices with the waste options for the shower spaces that it allows more choice in sizes of tiles. What size shower are you wanting to go? Will it be more like a 1000 x 1200 rather than the standard 900 x 900??

Hi Doug, looks great! regarding the floor my only suggestion would be to avoid the grout line down the centre as you have it. it is the first thing that draws your eye, and if you are going to the detail and expense you are then looking down is not what is going to show it off. From that I mean make it complementary to other things not competing.... eg a simple 1/3rd 2/3rd off set to break up the line and allow your ceiling feature to draw the eye. cheers

Personally, I don't think a 3.6 x 2m is small at all so I think the tiles would look good. Our bathroom is a bit smaller than that (but way larger than our old bathroom), 1.8 x 3.4m, and we are planning to get white 30 x 60 wall tiles and 60 x 60 floor tiles. I had not even thought it would look small based on those tile lengths and the tile place had a display bathroom with one wall (2m) in the these sized wall tiles and I thought it looked great. They also had the 30 x 90 wall tiles (longer length but same tile, which we saw laid in the 2m display area as that ) but those were a bit more cost wise so I think for our budget we have to stick to 30 x 60... But I do love the longer tiles (and wonder as it is not the standard size, if it will be less likely to date as quickly which could be another positive!) so I agree to do what you like and don't worry as someone will always disagree or recommend another way based on their persnal preference.