I have picky and obsessive streaks about various things, so I have determinedly avoided designating pipes. I choose pipes and blends on inspiration, always congratulating myself on excellent choices (some are excellent and others not, but that's my attitude). If I started tasting leftover Lat or some aromatic flavoring, I might designate a cob, but I haven't. If I smoked Lakeland aromatics, I'd designate a cob, because that flavoring is so distinctive -- taking other people's word -- and so persistent. But I don't smoke Lakeland aromatics. Meantime, I have 92 pipes, not competitive with some restoration members here, but plenty of pipes to have a long rotation, so not much flavor gets retained. Also, I wipe out my pipes with a paper towel, to maintain only a thin carbon layer, as do many members here, and I don't build cake or ever have to ream, so that also limits ghosting. For me, pipe smoking is about pleasure, not perfection. I do understand the other approach, where some perfectionism is part of the pleasure. To resort to a cliche, whatever floats your boat, or mine.