This is what is pretty much guarenteed to happen with your AT-6:
http://media.putfile.com/Byron-Texan-Deck-Slide

Again, most instructors wont teach you on it anyway...

Whats so bad about a standard trainer? You're afraid it looks ugly?!? Paleeese....you're not going to be entering beauty contests with your trainer. It's meant to successfully teach you to fly, and thats what it does.
All the advice given here is sound (except ChrisHays' advice...he is after all a "professional prop breaker"...'nuff said). No one says you have to keep the trainer, so just get one, learn to fly WELL, then stop flying it if its so hideous. I have a good feeling you wont regret it! (Heck you may want to keep your trainer!) Cheers!