Pazz, what a legend!

A few non-professional comments:

- you have a big entry. I think a BIG front door would do it justice. Maybe 1.2m wide?

- true "media rooms" are normally as dark as possible. With windows and a glass (?) external door, it may be difficult to make the room dark if you want a true home cinema experience. I'd also question whether the external doors to the media room would ever be open. Personally, I'd be worried about security if anyone could walk in from the street.

- what is the purpose of the store room between the pantry and the media room (especially with the large cloak /store room as well)? Would a super-sized pantry be more useful?

- I'm not sold on the living / dining set up. As pictured, it would be hard to navigate around the space if anyone was sitting at the dining table. Also, if you intend to have a TV in that space, then positioning the sofa so that it faces the TV and still having plenty of room for a large dining table may be a challenge. I like Pazz's suggestion of combining the dining table with the island bench.

- will you have enough space between the cooktop and the fridge on the LHS of the cooktop? It looks a little narrow. I would consider moving the cooktop further to the RHS to create a cooking triangle with more room for ease of movement and access.

- although you have a separate home office, if you have children or if you frequently find yourself doing the odd online task while cooking etc (e.g. checking email, online banking), then you may want to try to squeeze a study nook into the end of the kitchen closest to the outdoor area.

- as you have a shower in the downstairs powder room, I'm guessing that the home office is intended to double as a bedroom. As such, I would include a BIR in the home office. It will also be helpful for home office storage requirements.

- a door in the laundry, permitting access to a narrow outdoor clothesline attached to the house of fence, is also a great idea from Pazz. If it's a glass door, you could use frosted glass if you're concerned about privacy.

- I don't think it would cost much extra, so I would consider bumping out the roofline of the entire rear patio to provide plenty of outdoor space, for example, if you also wanted an outdoor lounge or an area for children's play equipment.

- I also really like Pazz's suggestions of under stair storage (accessed from the garage) and a big window in the stair well. You could use frosted glass if you're concerned about privacy. You could also try to bump out the garage to the zero lot line boundary, depending upon your local council requirements and relationship with the RHS neighbours.

Good luck!