Silk would be interesting, not to mention elegant. As for paints, the Silver Illusion appeals, but it might throw green (not sure). I also agree the Tranquil Retreat is a good one. I'm wondering how big the feature wall is, and what is going on this wall, eg TV, fireplace, large artwork, etc.?

My current kitchen has black subway tiles with white grout and everyone loves them. I bought my house with the existing kitchen and have changed the accent colour of the light shades and accessories from red to green in the last year (photo is pre green!) as I love retro mid bright green. Herb plants and glass containing cut herbs from my garden plus cheap black metal indust chic shelves that house lovely green china items also help soften the tiles. I would ideally change the benchtops from white laminate to med rimu type wood and steel, go for a darker grout for practical reasons and change the cupboards from this grey/dark brown laminate to lighter wood (not scandi white type though - I think is now getting dated and is to me a very cold style and not practical). I have my own style, love colour pops and I would best describe it as eco retro boho industrial chic - eclectic. Go for your style and if its not your forever house - think budget and what will be easy to update. I think subway tiles work well for updating and are classic but perhaps think colour instead of white or black as well and also grouting colour - it makes a difference.

I have a separate guest toilet without windows using a ceiling extractor fan - not a problem. I also have internal cavity sliding doors to bathrooms and toilets and love how they give extra space and options regarding placement of items. Another location alternative for you may be between the cinema room and the kitchen, depending on what you had planned for that extra space in the kitchen. Two metres is a wide hallway, if that is what it is? Ours is 1.3 which is considered wide (as we need to accommodate a wheelchair which has to turn into doorways). An advantage of a very wide hallway is it gives room for extra furniture placement such as bookshelves, linen or other cupboards if needed. I don't see a linen cupboard or pantry cupboard in your plans. Something else to think about is future proofing - try to cover future possibilities with regard to function, as making structural or fittings changes later can be more expensive, and may come at a time when you can least afford it (e.g. injured, disabled, children, aging or other such people visiting your home). Lives change, sometimes over time, sometimes in an instant, and suddenly the doors are not wide enough (especially the toilet door!), or the walls are not strong enough for a weight-bearing rail, and a host of other things. We put 900cm doors as a minimum and it makes life a lot easier, including moving furniture in and out. Universal Design principles are worth a look. Sadly these considerations are currently considered special or optional, although there are moves to change that, so that builders and architects will consider these things as standard.

I've been playing around with a pantry location. Originally, I was going to move the pantry into the laundry with some custom shelving and cut the laundry space in half. Now, Im thinking of cutting into the study area and building a wall there, and converting the new space into a long and narrow walk in pantry. Either that or build half a wall and put built in shelving in the study. Building the extra wall will reduce the need to cover in the door way that is currently in place and instead utilising it. Thoughts? p.s. this isnt too scale.