I've been on a personal quest to find decent hot dogs at WDW and so far it's not pretty. I, too, like my hot dogs plain, which means the taste of the actual hot dog really matters. The basic hot dog at most WDW locations is 60% chicken/40% beef and they are usually served with some sort of chili or other topping unless you specify you want it plain (I think Disney knows they taste awful plain). Yes, Sommerfest has all-beef hot dogs. The only other locations I've found are at Downtown Disney. Wetzels Pretzel's has an all-beef Pretzel Dog that is in a pretzel wrap instead of a bun. The other place is Pollo Campero and they use some sort of gourmet bun. Buns for hot dogs and burgers at WDW are anything but normal. They lean towards oversized wheat buns that are usually tasteless and sometimes fall apart in your hands. Casey's Corner is using the chicken blend dogs and have added a "Chicago-style" version, which is on a poppy seed bun with a bunch of toppings. You'd think a place like Disney would have plently of good-old traditional American hot dogs that you can add your own toppings if you want. My quest continues.