Doubled Coin Collectors, What Floats Your Boat?

Hi everyone,

I've been sifting through a batch of nickel dollars and of course have found lots of minor varieties: die cracks, doubling, etc.

For die cracks two different collecting strategies sort of naturally suggest themselves to me: finding a coin where it looks like the die was about to fall apart filled with spectacular and dramatic cracks or finding a group of coins that shows the progression of the cracks as the die beat itself to death.

Doubling on the other hand, especially machine/strike doubling which seems to be caused by loose dies/etc don't have this natural progression being much more random in nature. Doubled dies are another thing because once the die is damaged it's almost like die clashes, the next run of coins is going to have the same doubling.

For MDD specifically I can see where someone might enjoy trying to track down the combination of all possible doubling patterns, for example if it's know that "Dollar" is commonly doubled on a coin collecting single digit double "D", double "O" ... and presenting the 6 coins perhaps along with a fully doubled "DOLLAR" ... that would be a lot of combinations but hey, we're all a little kooky with the things we enjoy collecting in some way. I can also see that others would just prefer a single dramatically doubled coin to put in the collection.

So I'm curious: those of you who do collect doubled coins, specifically MDD coins, what is your preferred way of collecting them?