I'd repaint your kitchen cupboards - as someone else said, use Frenchic (don't need primer), or Wilko cupboard paint - I'd use white. You don't have to take the doors off to paint them.
I quite like the blue bathroom but it seems others don't, you can use Frenchic paint to paint the tiles there too, or tile paint.
I'd think about painting the pink bedroom too, it's cheap and quick and something more neutral would be better. You want to keep the "move straight in, blank canvas" appeal of a new build.
I'll come and paint your house if you'll come and declutter mine!