Light, dark, in the aromatic world,. that doesn't mean much. There are lots of different leaf that can be dark, some better than others. And, sometimes the topping may darken the leaf. But, these you mention are Virginia/burley blends.
So, I am guessing that beyond the added toppings, which you probably can't taste very much of, besides smelling in the room note, you may be enjoying the background tobacco flavors, which include a tangy Virginia. You might try searching out Virginia based aromatics. I could list a few, but this is not my thing. Plus, you may know better than me which flavors you'd be interested in. Maple, whisky, kendal cream, these are out of my range of experience. However, one blend comes to mind that lots of guys like, C&D Autumn Evening is a great aromatic. And, the tobacco flavor is pretty good also.
I'm sure that others will be better able to list off some to try.
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