I like variety, I try to only open 1 tin of type of tobacco (burely, VA, VaPer, English), generally have 6 tins of something open.
I have had cases when I open a tin and smoke through it all the way "fast" (still take about a month or 2)I won't get the nuances of it. I have a tin of Solani ABF which tasted very flat when I opened it, drying the flakes didn't help. I left it in the tin, revisited now and then. After 5 months it got better, after 1 year in the open tin it is actually very good and would be cellar worthy which for me means 5 tins of it. If you know the blend your method of smoking is fine, but for testing a blend the first time it wouldn't work for me.