Where you stay depends on your budget. The value resorts are in your face fun. The moderate resorts a bit more restrained and huge (POFQ, which is part of POR, is a bit smaller) and the deluxe resorts a bit more elegant and smaller, but still fun.
I started out at Yacht Club (concierge), then Coronado Springs, than Pop Century. Hey, it's what fits the budget!
If you stay at Pop Century and want a quieter area, ask for the 50s building facing Hourglass Lake. You would be facing the unfinisihed portion of PC, but it has been painted to blend with the landscape. You also have a view of the fireworks from IllumiNations! I was in Building 3 (Building C on the signs). I was there 9 nights in December with families on each side of me, and never heard a peep from them when they were in the rooms. The All Star resorts have a reputation for inadequate soundproofing between rooms.
POFQ was renovated in 2004 and looks very romantic. If this is a romantic trip, and it fits the budget, that would be my choice. Loved Coronado Springs. It's a convention resort and is huge. If you decide to stay there, study the resort map in advance and select two or three areas that are acceptable to you, then push the CM at check in to find you a room in those areas. I faxed my room request, but the only thing they honored was the non-smoking. I specifically did not want to be in Ranchos (I live in a real desert--don't want to stay in a faux desert in the middle of Florida!) which is where they kept trying to put me. Another CM rescued me and found me a lovely room in Cabanas B--near Bus Stop 4. Perfect location for me.
In the parks, don't worry about being "adult". Go on all rides that appeal to you, as long as you don't have physical issues with them. Just concentrate on relaxing and having fun. You're at WDW--you're allowed to be young regardless of your chronological age!