Sit down on your best seat surrounded by your beloved collections and talk about your favorite galleries, inventories and so.
What makes you like them? Did they sequels on them? Which features should be shown in other games?
One of my favorites has to be SCII's weapon gallery, as well as the weapon exhibitions. I love that they gave them interesting stories and text, even when they all share the Soul Edge or Calibur. The music and simple but well-made layout makes it feel like you're staring at the world's greatest collection, or that the weapons have been kept safely for hundreds of years for you to watch. I also like that you can zoom in and check all the details.
A bummer that SC6 used darker lightning and palette, they could've copied from Smash Bros and gave you the option to change lightning and background.
I like that Senran Kagura 2 and REmake also demonstrate how the weapons work, like Hikage's knife being held together by a chain or showing the guns' mechanism in REmake.