[cindyo]

You're killing me with this itinerary...sorry to say...I see no beach time, laying around, fine dining..I do know your age but not who you're traveling with, but no one in our family would like your schedule.
The first thing I would do would be the tour, then take it from there. There's so much to see, and NOT to see...if you get my drift.
Butterfly farm, as previously posted, isn't all that great for a 30 yr old.
Places to see would be baby beach, california lite house, alto vista chapel, natural pool.
Sorry I can't recommend any boats to use or dive shops to work with.
There's plenty of bars around...Senor Frogs downtown,Sopranos, Busters Garage, Hooters, Hard Rock, Moomba Beach.
I am sure others will chime in so read them all.
No matter what you will love aruba and its people.