Hi Clair, just sent you an email. Talk soon!

Perhaps a colored door if you paint the home grey. Maybe Red? You could simulate a color change on door by hanging something over the door that is the color like a tablecloth or piece of fabric. If you search houzz for" grey homes", you can see what others have done. My home is painted Cape Cod Grey with white trim and it has been very easy to live with for years. I have a dark grey roof.

Well that is one rule that begs to be broken! I think a matte silver roof would look good....not weird at all. I don't think the house below looks "weird."

Wow! What a beautiful home :-) It's got lovely clean lines, but these can also look a bit stark, can't they? Have you considered Espalier or something similar against the walls between the garage doors, etc.? That would add some softness and colour (as well as fresh fruit!). For the front garden, you've really got a lot of choice for such a lovely aspect. If you were after a more 'finished' look, then perhaps consider a front (picket) fence with smaller natives and a bigger grevillea or similar as a feature. For privacy, perhaps a hedge of lillypilly. Or for a more formal look, landscape with sandstone to create tiered beds and plant out with smaller natives, lavender a herb garden or a mixture of all three. Enjoy!