I will hopefully be moving in May to somewhere with a bigger garden. But I don't tend to go overboard with themes/decorating etc.
We rent in Spain so it will depend what's there in terms of fitted wardrobes etc...
With both boys I had a white ikea hensvik cot - I left it inthe uk but would happily buy the same again unless I find a preloved bargain. If I need wardrobes/drawers I'll have the hensvik wardrobe in white and white ikea malm drawers. White sheets. Sleeping bags. An assortment of blankets. A few soft toys and it soon looks like a baby space! We have a black leather sofa bed that tends to live in the "nursery" too.
In the Uk both boys had white walls. ds1 had a black and white curtains and a black lampshade, he loved the curtains! Neutral carpet and a small sheepskin rug. ds2 had neutral curtains, neutral carpet and a couple of bright red cushions etc. both got letters spelling their name etc once born.