I have 8 or so different tins open at once.
I do have some bulk stuff in mason jars. Quarts for long time storage, small (4oz?) jars for usage of bulks.
Basically I buy a tin, smoke it a little at a time to see if I like the tobacco. If I like it, I buy either bulk or 10-20 tins, to store away and pull a tin or 1-2 oz at a time to smoke. If I don't like it that much, I slowly finish the tin and not buy again.
Currently I have:
965 40 tins, 3 pounds bulk
bb1938 20 tins
Elizabethan Mixture 20 tins
Balkan Delight 10 tins
Old Dublin 5 tins
Squadron Leader 1 pound bulk
Night Cap 5 tins, 1 pound bulk
HH Latakia Flake 2 tins, 1 pound bulk
HH Bold Kentucky 1 pound bulk
HH Acadian Perique 2 tins, 1 pound bulk
University Flake 2 tins
Irish Flake 2 tins
Red Rapeere 1 tin
3 Noggins 1 tin
Proper English 2 pounds
English Oriental Supreme 1 pound
Irish Whiskey 1 tin, 8oz
Irish Oak, 1 tin
Escudo, 1 tin
Luxury Navy Flake, 1 pound
Luxury Bullseye Flake, 1 pound
Commonwealth, 1 tin
Bothy Flake, 1 tin
The Solent Mixture, 1 tin
HH Vintage Syrian, 1 tin
1965 Mixture, 1 tin
Haunted Bookshop, 1 tin
Eastern Star, 1 tin
Orient Express, 1 tin
The Aperitif, 10 tins
London Mixture, 10 tins
Royal Yacht, 12 tins
Montgomery, 1 tin
Union Square, 1 tin
St. James Woods, 1 tin
Frog Morton Cellar, 1 tin
Condor Green, 1 pouch
Carter Hall, 2 pouches
Capstan, 1 tin
St. James Flake, 1 tin
Halberg Green, 1 pouch
Edward G Robinson, 1 tin
A lot of the 1-2 tins stuff I have not tried yet. I only started smoking 2 years ago, and got hooked on 965, which I always come back to.