On the most recent episode of "So You Think You Can Dance," head judge (and producer) Nigel Lithgoe was evaluating a beautiful Viennese Waltz a couple had just danced. He pointed out that VW was a hard dance to do on the show because it doesn't have the "flash and dazzle" of some of the other dances. And he was right. The studio audience cheers louder for things you might expect to see in the Olympic Gymnastics medal round than for beautiful dancing.
At 20 you are young enough to do the athletic moves, and to whip your body into shape. And if you enjoy the tricks and you have a partner who can do them, fine. Remember also that dancing involves a lot of illusion, and much of what you think you see isn't really quite what is happening (this will mean more to you as you get into it).
You aren't old enough to remember Gene Kelly, but you can find him on YouTube. I read (if my memory isn't playing tricks on me) that he didn't begin dancing until he was in his twenties, and he became one of the best in the world.