I have had the same experience. I think that time of day, size of the bowl and moisture content seems to play a role in the sheer nirvana of some smokes. I prefer Latakia blends to Virginia's. I have smoked OGS which is highly rated by most smokers and I don't enjoy it. I've also tried Marlin Flake, also a supposed outstanding tobacco and likewise I did not enjoy it. Give me Penzance, Balkan Sasieni, Black Mallory, Three Oaks Syrian, American Patriot or any other Latakia blend in a very large bowl and I'm a happy man. I find that first smoke of the day tends to be an aromatic, (a blend of BCA and Wilke's Best Make recently introduced by a friend, or a blend of McClelland Coffee/Cocoa/Pastry) and as the day progresses I build toward Sterlings 1776 Bostonian, C&D Engine 99 (sometimes with added cigar leaf) to bedtime with a stronger Latakia like GLP Odyssey or Three Oaks Syrian. I also find that a humidified blend smokes far tastier than a dry blend hands down. This morning I smoked Engine 99 in a small bowl and it was not great. Give me the same tobacco later in the day in a large bowl and it's a much better experience. Like Greg Pease, I maintain my pipes with a thin cake and they are all basically interchangeable for me. So everything being equal; freshness of the pipe, moisture content of the blend, personal taste preference of a blend etc., that the body is best equipped to "handle" stronger blends later in the day with a progression of smokes lighter to heavier as the day progresses.