For me, honestly, the whole tin. I've loved the first few bowls of some and then been over it by the end, and vice versa. New tobacco tends to excite me, but then I change how I feel about it with regular exposure.
Agreed. I've had the same experience where I really enjoy the first few bowls, then as I smoke more, I recognize something in the blend that causes me not to like it as much as I initially did. I've found the same thing with scotch and bourbon. I've never loved a blend on first puff only to dislike it later, but I've had some I loved at first that I ended up only liking okay later on.
half a pouch is enough to make up my mind, however I have found many blends shall improve quite significantly after being left for some extensive time in jars
For whatever reason, I seem to enjoy most blends better after the tin has been open for a few weeks. I've never opened a tin and thought that the tobacco got worse over the following weeks. To my taste, it's always either improved or stayed the same. And certainly many blends benefit from long-term aging in jars (or tins).
I still have pounds of Virginia #1 in my cellar. I bought five without even a second guess, because 1) it was a Virginia and the #1 Virginia at that, and 2) even 9-10 years ago people were talking about how tobaccos were all going to be going away soon, so I was buying 20 tins at a time and 5 pound bags of everything (and I'm glad I did).
I'm trying to avoid cellaring blends I don't smoke, yet somehow, it seems inevitable.
Back before Peterson picked up the Dunhill blends, when we all thought that the Dunhill blends might disappear, I bought about 5 pounds of Nightcap, mostly bulk, but some tins as well. Then I discovered Quiet Nights, which to me is an infinitely better take on the same flavor profile. Now, I don't really even smoke Nightcap. When I feel like having a heavy lat bomb with perique, it's Quiet Nights.
I did dig out a jar of Nightcap so I can compare a few bowls to C&D's From Beyond, just for fun. Nightcap is a good lat bomb benchmark, so I'm sure I'll smoke it to compare to other blends, if nothing else.