I'd have pink tiles on the lower walls, a band of powder blue, then white on the upper half - except for the bath wall which would get blue with a band of pink:
Wrap around shower curtain rails are the best, especially when they're supporting shower curtains like this one - flamingos with a splash of avocado. It wouldn't be a bathroom without it.
You need a little cabinet to store all the essentials. Check out how awesome this one is:
The best thing about liking retro style now is that you can have the old fashioned look, and the comfort of modern technology. With that in mind it would be heated towel rails all the way. Towels would come in His, Hers, Baby's and Guest varieties:
Then there are those other essentials, like the shower shelves and the loo brush holder. I really like the idea of having one of these little space saving slide-out cupboards too, to store the extra toilet paper rolls, etc.
Finally the kitschy finishing touches:
Alternatively, we could just take a leaf out of Marianna's book and set up a bathtub in the front room...
What would your dream bathroom look like?