Aging tobaccos "on purpose" is a new trend. Before you go converting rooms into tobacco storage, try buying a few already aged blends of something you'd think you'd like to age. I'll bet that age doesn't do what most people thinks it does. I did this. I traded and bought a few tins of things that I was curious about, and it kind of gave me an idea of what happens with age.
I'm, not sure why, but people don't discuss how tobaccos tend to taste more like dirt after a certain point. Some lose any hint of sweetness and take on a more earthy cigar-like taste. I have read of men smoking 20+ year old Escudo with eyes rolling back into their heads in ecstasy. That wasn't my experience. However, everyone is different. Maybe a lot of people like that dirt taste. I've sort of figured out what I think will age well and I have a 140 lbs set aside. I didn't save a bunch of my favorite tobaccos, because I know that perique just loses its peppery-ness after a while, and many sweet tobaccos becomes more bland. Those are my observations, and someone else may differ in tastes. But, I set back things that I think will actually improve. The rest I just smoke at will.
So, just try out some of the already aged blends to see if it is something worth your effort to age. It's hard to just ask someone, because that someone may like things totally different from you. To make my point, find a blend you love and read the reviews for it on tobaccoreviews.com, someone will hate it. Everyone has different likes and dislikes. It may even be that aged tobacco just isn't for everyone. I could see how someone who likes bright Virginias with that citrusy zing to it would not want to age them.
Try a few aged blends. B&Ms will almost always have a few old tins of something in the back. And, then there's the auctions. Or, trades that come up periodically. I hate to be the "emperor wears no clothes" guy, but we can't just say that everything "improves" with age. If we can't even agree on what the word "improve" means.