I get displaying unopened toys. I generally tend to open my TFs because they're so fun to mess with, but other stuff?
I don't know, it's like I get a nostalgic dopamine hit that reminds me of all the time I'd spend in toy stores and Walmarts and stuff looking at toys while my parents were shopping.
Easier to display, too. I have a big cork board above my computer desk with a ton of amiibo, MotU Classics, Tiger handhelds, and one Mega Construx Halo set pinned.
Easier to dust, too.
Now, if I can ever get some good display cases, that may change, but for now... I enjoy it.
...that's all blistered stuff, btw. Boxed toys, particularly without window packaging, can be another story altogether.