I have only been smoking a pipe for a year but have over 30 pipes (mostly Peterson and Savinelli) and as many choices of tobacco (mostly purchased with help from this forum.) I think I might be obsessive compulsive! Lol. I smoke everything type of blend imaginable and readily mix blends depending on my mood. If this is a silly question - I won't be offended if you set me straight. ). Two of my top 5 blends are flake (Solani Aged Burley and SG Full Virginia Flake.). I got lazy and rubbed a tin of each and placed each in discreet mason jars. Something happened after they sat for a month in their jars. The flavor profile changed dramatically - for the better! They seemed to burn better, stay lit better and had a higher nic hit. The flavors seemed more complex and felt somehow better presented. Is this just me or did something happen? If you rub a flake out and it mixes with oxygen does something happen? Surly a month can't make that much difference.., can it?