Well I disagree with the others.
Romance is what you make of it, not where you stay or how much $ you spend.
We spent our honeymoon at POP and it was wonderful. DH brought breakfast to the room every morning, we took walks around the grounds holding hands, he gave me foot massages every night, just was over all attentive.
If you want to stay at ASMo, then go for it. As far as the kids running around thing....it is DISNEY, they are everywhere. lol
You can always sneak off to a hidden spot to make out, makes it fun and exciting.
Stay where you wish and if you go with a romantic attitude.....it will be there.