My older two boys share a room and sleep in bunk beds. Since we moved them to bunk beds it's been great as it has opened up a ton of space in their room for quiet time away from the chaos of the rest of the house. I love bunk beds.
Going down stairs are so mainstream. Imagine sliding down from the floor to the first. Talk about fun! But, I will need stairs so I can walk up to the rooms. But, an indoor slide is good when coming down.