I've been really putting this rusticated Dr. Grabow Royalton to work today! First I smoked C&D Pegasus, then Carter Hall, then Prince Albert, and now Carter Hall again.
Historically Carter Hall has always been my favorite of the bunch, though since I started smoking my Burley blends with Dr. Grabow filters to smooth them out a bit I think I might actually like Prince Albert best. With Carter Hall I really taste the whiskey topping and the acidity of the bright Virginias the most when it's run through a filter, but with Prince Albert what I get the most of is cocoa and the natural nutty Burley flavor. Carter Hall seems a bit sweeter as well.
It's still a darn tough choice which I like better though, so I think I may have to do a week where I smoke nothing but Prince Albert and Carter Hall to really make up my mind about which I like best and should stock up on!