Not sure where you're located, but a gravel driveway may help to soften the house versus asphalt or concrete. Soften up the area with grasses. Here's a link to a photo of grasses with a hot color palette http://www.spacemakerpress.com/catalogue/catimages/st05imgb.jpg You can always choose a more muted color palette as well. I would definitely tier the plan heights so they're taller against the house and gradually get lower. It would help to bring the house to human scale and not appear towering above. The pathway could be in a natural stone - the same color as the gravel driveway (if you can do gravel).

Hi everyone, we have moved in! We didn't manage to paint before we moved and think we will go for a staged approach - above the wood panels first in a warm white then decide on the panels. I'm having a bit of trouble working out what kind of sofa to buy and how at arrange the lounge. All furniture except coffee table temporary in photos and would love some ideas!

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."

It sounds lovely. The ceiling will be more than suitable for a transitional style. I think the wainscoting would also be fine but as I'm cautious I'd be adding after I'd lived there for a while. It does seem more traditional than transitional. On the other side I'd love the bead boarding in the hall.