I would have to vote for TL. Somehow I'm guessing that you don't have kids! My hubby refers to our yearly WDW trip as the "it's all about the kids, we're stuffed into a small hotel room, I won't get any for a week and a half vacation"!
Seriously though, I did however notice more romantic looking small "beachy" areas around the BB lazy river than I did at TL. There were a couple of lounging areas that seemed to be tucked away behind some bushes that no one was sitting in at all. It appeared the only way to get to them was via going across the lazy river.
Hmmm... maybe next year throw the kids onto a raft in the lazy river and enjoy a romantic liason in the bushes with hubby!!! And I thought there was nothing that could make our vacation more perfect!
Enjoy and I envy you for taking the time to make your trip romantic!