My dd16's favorite park is Epcot-World Showcase. So her favorite resort is any she can walk to/from Epcot, i.e. Swan/Dolphin, YC/BC, BWI. If your teen's fav. park is MK, then I'd say any of the monorail resorts, or if they like DTD, then I'd go w/ POR/FQ (boat to dtd). If you feel you can allow your teen to come and go on their own (within reasonable limits), then this close proximity will allow them some independence.
Sue