I like doors with panels and I like the doors to match the base boards and window + door trim (usually white). Zebra wood is very unique looking. I like art and rugs to get the attention in a room, not the doors. However, I came across gorgeous photo that appears to use flat veneer zebra wood. The baseboards are white. The multi-color slate really enhances this zebra color, too. I could not find the gray hue zebra wood. Do you have a photo or link?

I don't know how hot it gets in Auckland in summer (I've only ever been to NZ in winter!) but if it gets hot, then go for a pale colour. Dark roofs should be kept for cold places!

The market is full of tropical/botanical art at the moment which lend themselves well to tropical or beachy looks. The look you are after calls for natural textures with a soft colour palette, think linen bedding and layer it up with throws and cushions for texture and pops of colour. In my opinion drapes are not a good option in your room as the ceiling slopes to just above your window at a certain point. This would dictate the height at which your drapes hang and, in this instance would be too low. To soften the windows, I would have a tall palm or Fiddle Leaf Fig tree in wicker basket. It also looks like you have the space for a chair.

Whisper White sounds like it'd be great and exactly what you're looking for. What did you end up going with?