Would have to know more info? Do you like coasters? Shows? When you are going? Age of kids if you have any?
I love both parks but BG is my favorite of all the Florida parks. Comparing the animals at AK which I love also to seeing the animals at BG is a totally different experience. You see so many more and are much closer to most of them at BG than at AK. Plus you have the rides, the kids areas, the shops, the music, and the good food(actually pretty much like SW for food<g>). I enjoy the shows at BG-even the silly rock and roll one.
SW is a great park, too and we go there more(usually-except for this year) because it is closer. SW has 2 coasters, a splash type ride, and a simulater ride. I really enjoy the shows because even though you've seen them a hundred+ times there is always something different because it is live entertainment. Can't wait for the temps to cool off a little.