Hmmmm, my dream vacation might be different than what a 16YO would want.
I would want club level but she might not care about the club as much as being able to get what kind of snacks she wants, not just what is offered at the lounge. I would probably opt to stay at a monorail resort -- Poly, GF or Contemporary unless she has a fav resort elsewhere. I'd start looking into things she might like to do like (try to tape :
* Disney Quest
* parasailing
* surf lessons at the water park
* water park tickets
* wild africa trek
* wanyama safari and dinner (but for AKL guests only)
* snorkeling with sharks at Typhoon Lagoon
* various tours available at MK and Epcot
* fun ADRs -- BOG, Ohana, fav character meal, fancy places like California Grill, A&V, Le Cellier, etc.
* Richard Petty Speedway -- she can't drive but can ride along
* spa trip
* Fireworks cruise
* dolphins in depth or divequest
There's a great show called the Hidden Parks of WDW that pops on TV every now and then, so look around for it and see if you can catch it. That might give you some ideas.
BUT I think for a dream vacation I'd stay AKL club level and do the special resort guest/club level guest only safaris. I'd dine at the signature restaurants pretty much exclusively. A park hopper would be a must - if it was with younger kids, no way, but at 16 she'll be able to handle the busses and such even into the wee hours. Other than dinners and the special events/experiences I'd just go with the flow. Oh and Definitely do a cake one evening at dinner (at the beginning of your stay since even the best cake eaters usually have left overs) 
