Enjoy your trip! I know you'll have no problems finding what you're looking for once you get there. Just remember to take it easy, and enjoy each day. You'll find lots of possibilities in Phuket. Also remember to communicate with each other as you explore new things, and if something doesn't feel right to BOTH of you, STOP, and figure it out.
Remember to wear life like a loose fitting garment, and don't take things too seriously. Many of the most enjoyable things we have ever done have been un-planned, so allow yourselves to just explore, and you won't go wrong.