When I put together an order for tobaccos of a new type that I haven't tried before, I make sure to get a full spectrum of the tobacco in question. For example, when I put together a sampler order of Virginia Flakes, I make sure to get blends of varying nicotine strengths, and vary the strength of flavor.
For the Aromatics, I'd make sure to get tobaccos with different amounts of casings, different flavors, different forms, and from different blenders. There are certain flavors of casings, especially cherry, that some people just can not stand smoking.