Nine would have loved to do all those little things for Rose to make her life more comfortable. Now that their true feelings are out in the open, he would be able to express everything he feels for her. My head canon is Nine giving Rose a foot massage after every adventure he makes her run for her life.

A 2 month vacation in Hawaii! That is my kind of man. Lucky Rose and the Doctor. I am sure they would be that one couple that would make everyone uncomfortable with their constant Public Displays of Affection ;)