I also wanted to mention that I am zeroing in on design personas, which are imaginary people that represent the users for the dexter product.
To summarize, there are four of them right now and here they are:
The Nostalgic : Person who wants to relive childhood
The Restorer: Person who likes restoring old stuff
The Tinkerer: Person who likes to modify stuff
The Preservationist: Person who likes to preserve childhood
We will be targeting Dexter primarily toward the first one. The others may get their own interfaces if appropriate.