I have only ever sailed on the Magic (2005 50th Anniversary West Coast Mexico), but from everything I've read I think I would definitely prefer the classic ships. The Dream and the Fantasy are just too big for my tastes.
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!