All of the cartridges have two Creative Features in common. They are Shadow and Blackout. The function of these two keys are exactly the same in all circumstances: Shadow perfectly mats the original graphic and Blackout gives you a general shadow of the original but with no interior cuts (such as the two holes in a capital letter B).
Discovering the rest of the individual cartridges Creative Features is like embarking on a scavenger hunt where you shriek “ah ha” every time you try out a new one. Doesn’t it make you excited to find out what new ones the Cricut team will come up with next?